Weight Loss Of Samples Research Articles

Experimental and modeling study on centimeter pine char combustion in fast-heating Macro TGA

Biomass energy is an important renewable resource, and thermochemical conversion, including pyrolysis and combustion, is one of the main methods of biomass energy utilization. In industrial reactors, the biomass particles will experience a fast heating (∼1000 °C/min) process during pyrolysis. The particle size of biomass applied in industry has a wide range (from millimeter to centimeter scale). The study of the reaction characteristics of biomass pyrolysis and combustion is helpful for optimizing furnace design and working condition selection. In this research, the combustion of centimeter-scale pine char was studied with a newly built fast-heating Macro Thermal Gravimetric Analyzer (Macro TGA). This Macro TGA is able to conduct the pyrolysis and combustion of large biomass samples (up to 40 mm) with a fast heating rate (∼1000 °C/min), which is able to reflect the working conditions in industrial-scale reactors such as grate furnaces and dual fluidized beds. This Macro TGA can measure the online sample weight, temperature and sample size simultaneously during pyrolysis and combustion experiments. The combustion characteristics of different sizes of pine chars were investigated at various temperatures and oxygen concentrations. A zero-dimensional model was established to predict the sample weight loss, temperature change and sample shrinkage during the pine char combustion process. Three kinetic parameters α, A and E were applied in the model, and the values of the kinetic parameters were optimized by a genetic algorithm. The model prediction and experimental results are consistent with each other. Compared with previous studies, this study developed a new experimental method to measure the reaction characteristics (including sample weight, temperature and size) of centimeter-scale biomass under similar pyrolysis and combustion reaction conditions compared to industrial reactors, and a zero-dimensional model was established to describe the pine char combustion process.

Optimization of Pyro‐gasification of Carbon Fiber Reinforced Polymers (CFRPs)

AbstractThis work focuses on the optimization of pyro‐gasification process of carbon fiber reinforced polymers (CFRPs) with the aim of recovering carbon fibers (CFs) with properties suitable for the production of new more sustainable composites with high performances. In particular, the pyro‐gasification process is carried out on cured CFRPs panels based on both epoxy (EC) and vinyl ester (VC) matrices, which are the two most used resins for CFRPs. The matrix degradation is evaluated via sample's weight loss measurement and the recovered CFs obtained after different time of treatment are analyzed to identify convenient pyro‐gasification conditions to avoid damaging of the recovered CFs. The obtained results highlight the importance of the thickness of the composites to be treated for the identification of the more suitable pyro‐gasification conditions.

Research on the Corrosion Behavior of Q235 Pipeline Steel in an Atmospheric Environment through Experiment.

Low-carbon steel pipelines are frequently used as transport pipelines for various media. As the pipeline transport industry continues to develop in extreme directions, such as high efficiency, long life, and large pipe diameters, the issue of pipeline reliability is becoming increasingly prominent. This study selected Q235 steel, a typical material for low-carbon steel pipelines, as the research object. In accordance with the pipeline service environment and the accelerated corrosion environment test spectrum, cyclic salt spray accelerated corrosion tests that simulated the effects of the marine atmosphere were designed and implemented. Corrosion properties, such as corrosion weight loss, morphology, and product composition of samples with different cycles, were characterized through appearance inspection, scanning electron microscopy analysis, and energy spectrum analysis. The corrosion behavior and mechanism of Q235 low-carbon steel in the enhanced corrosion environment were studied, and the corrosion weight loss kinetics of Q235 steel was verified to conform to the power function law. During the corrosion process, the passivation film on the surface of the low-carbon steel and the dense and stable α-FeOOH layer formed after the passivation film was peeled off played a role in corrosion resistance. The passivation effect, service life, and service limit of Q235 steel were studied and determined, and an evaluation model for quick evaluation of the corrosion life of Q235 low-carbon steel was established. This work provides technical support to improve the life and reliability of low-carbon steel pipelines. It also offers a theoretical basis for further research on the similitude and relevance of cyclic salt spray accelerated corrosion testing.

The effects of pH on the precipitation of rice straw lignin from An Giang, Vietnam

This research aimed to extract lignin from rice straw and reveal the pH value of diluted acid at which the most effective yield of lignin was precipitated. In this study, rice straw obtained from local fields in the An Giang province of Vietnam and sodium hydroxide 2 M was employed to extract lignin from rice straw. Hydrochloric acid was used to adjust the sample pH values to be in the range of 1.5-3.5. Fourier-transform infrared spectroscopy (FTIR) analysis was used to characterize the functional groups of the lignin materials. Thermogravimetric analysis (TGA) analysis was employed to supply information on the thermal decomposition of the lignin samples. Herein, the results showed that lignin precipitated at different pH values affected its thermal properties. At 700oC, the yield of the remaining lignin components were 56% at pH 2.0, but the weight loss of lignin samples precipitated at pH 3.5 dropped to 85% because many non-lignin substances existed in the samples. The yield of the crude lignin samples obtained were 16.51, 17.66, 15.27, 14.33 and 13.26% for pH of 1.5, 2.0, 2.5, 3.0 and 3.5 respectively. The crystallite regions played an important role in the lignin structures. The spectrum peaks at pH 1.5, 2.0 and 2.5 were broader than the peaks at pH 3.0 and 3.5. The results demonstrated the highest percentage of lignin precipitate was collected at pH 2.0.

Influence of Rotational Speed on Subsurface Microstructure and Wear Property of D2/U71Mn Wheel-Rail Steel

In this article, the effect of rotational speed on the subsurface microstructure and wear property of D2/U71Mn wheel–rail steel is studied under pure rolling conditions. Rolling wear experiments were conducted using a GPM-40 rolling wear tester. The subsurface microstructure and surface morphology of the wheel and rail samples under different rotational speed conditions were analyzed using an optical microscope and field emission scanning electron microscopy. The results showed that the rotational speed significantly influences the wear property of the wheel materials. A low rotational speed could increase the friction stress at the wheel–rail contact surface, and the weight loss of the wheel sample was large under low rotational speeds. As the rotational speed increased, the weight loss of the wheel sample decreased gradually, but the change in the weight loss of the rail sample was not obvious. The thickness of the plastic deformation layer of the wheel sample increased as the rotational speed increased. However, the variation of the plastic deformation layer of the rail sample was not obvious. During the rolling wear process, a gradient plastic deformation layer (the surface was a severe plastic deformation layer, and the subsurface was a plastic flow layer) was formed at the wheel–rail sample surface. In the severe plastic deformation layer, ferrite grains were refined obviously, and lamellar cementite was fragmented into cementite particles. In the plastic flow layer, the ferrite grains produced obvious plastic deformation, but the change in the lamellar cementite was not obvious. During the rolling wear process, the relationship between wear and fatigue was competitive. Under low rotational speed conditions, the high weight loss of the wheel sample could inhibit the formation of fatigue cracks. As the rotational speed increased, the weight loss of the wheel sample decreased gradually, and the length of the fatigue cracks increased. The wear mechanism of the wheel sample transformed into fatigue wear. However, the surface worn morphology of the rail sample had no significant change under 600-r/min and 1000-r/min conditions. The length of fatigue cracks of the rail sample is slightly reduced under the 1440-r/min condition due to the increase of a small amount of weight loss.

Recession rate of carbonate rocks used in cultural heritage: Textural control assessed by accelerated ageing tests

• Quantification of the relation between grain-size and recession in carbonate rocks. • Improved understanding of the complexity of recession rate in carbonate rocks. • Definition of correction coefficients to be applied to known recession equations. • New methodological approach to estimating future stone deterioration in cultural heritage. In this study, the recession rate of eleven carbonate stones widely used in the cultural heritage of northeastern Italy and differing in their textural features and mineralogical composition was investigated. Samples of stones known as Vicenza (Nanto and Costozza varieties), Carrara marble, Verona (Red and Brown varieties), Asiago, Istria (Orsera variety), Aurisina, Chiampo (Ondagata and Paglierino varieties), and Botticino were subjected to accelerated ageing tests in an environmental test chamber for simulating the effect of rainfall, using two different water compositions corresponding to rainwater chemistry in the cities of Bologna (pH ∼ 7) and Stresa (pH ∼ 6) in Italy. Bulk stone recession was evaluated considering sample weight loss as a function of the number of wetting cycles. Moreover, direct measurements of recession were performed by confocal microscopy, which allowed 3D surface reconstruction of the stone surface and evaluation of differential recession as a function of calcite grain size. The results also allowed the definition of correction coefficients for calculating more precisely the recession rate of carbonate rocks using known recession equations from the literature. This pilot study illustrates a rapid and efficient methodological approach that can be used for providing reliable estimates of future stone deterioration in cultural heritage, related to specific environmental conditions and expected climate scenarios, which can be exploited for evaluating risk-based protection measures of a variety of historical artifacts and structures.

Effects of Psidium guajava L. Leaf Powder and Aloe vera L. Gel on Shelf Life of Citrus sinensis L. Fruits

Postharvest loss of fruits is a critical problem due of rapid deterioration during handling, transportation and warehousing. Edible coating over fruits is utilised to boost their quality and shelf life. The effects of leaf extracts of Psidium guajava and Aloe vera gel on the elongation of the shelf life of orange fruits were evaluated. Orange fruits were treated with Guava leaf powder and A. vera gel to assess their effectiveness in extending their shelf life and quality in storage. Weight loss, firmness, post-harvest decay, marketability and shelf life of uncoated and coated samples were evaluated all through the period of this study. Fungi were also isolated from deteriorating samples. A. vera was able to preserve the orange samples for 21 days; P. guajava preserved them for 17 days while the untreated fruit samples stayed for 14 days. Three fungi viz: Botryodiplodia theobromae, Fusarium oxysporum and Rhizopus stolonifer were isolated from the decomposing orange fruits. The result shows that orange fruits coated with A. vera gel and guava leaf powder is effective in extending the shelf-life of orange fruits when compared to untreated fruit (control) in the following order: A. vera>P. guajava > control. The findings from this study indicate that plant extracts could be employed to prolong the shelf life and improve quality of orange fruits.

Suitability of Auger Pressing Briquettes for Blast Furnace Use Based on Laboratory Tests

Briquetting is a process in which fine materials unsuitable for use as such are agglomerated to achieve a larger particle size. Auger pressing is a novel briquetting method to efficiently improve the recycling of by-products from iron and steelmaking. The high-temperature properties of auger pressing briquettes mainly consisting of blast furnace sludge and mill scale were evaluated. The aim was to determine the suitability of the briquettes for blast furnace (BF) ironmaking by studying the reduction, swelling, and cracking behavior using a laboratory-scale furnace. The blast furnace simulator (BFS) capable of performing non-isothermal reduction experiments with changing gas compositions was used to simulate the different stages of reduction up to 1100 °C in an atmosphere with N2, CO, and CO2 gases. A commercial olivine pellet and a conventional industrial BF briquette were used as reference samples. The sample weight losses were monitored by thermogravimetry, swelling as a change in the volume, and cracking by visual inspection. The samples were analyzed using microscopes and an elemental analyzer. Based on the BFS experiments, the briquettes proved to be a promising raw material for BF use. They were of a self-reducing quality due to their carbon content and showed reduction to metallic iron faster compared to the reference samples. The swelling was slight, and despite the minor cracking the structure of the briquettes did not degrade.

Wear resistance and hardness properties of TiB2– Fe coating developed on AISI 1020 steel by tungsten inert gas (TIG) cladding

The present work is attempted to improve the microhardness and wear properties of AISI 1020 steel by depositing TiB2–Fe composite coating using tungsten inert gas (TIG) cladding. In this study, different compositions of TiB2–Fe paste form were preplaced on the substrate plates and then TIG heat input was applied to deposit hard composite coating layer. The main objective of the present work was to explore the influence of TIG input current as well as iron content on the microstructure and surface properties of deposited coatings. Microhardness, microstructural and phase characterization of the coating have been done by the Vickers microhardness tester, scanning electron microscope (SEM), Energy dispersive spectroscopy (EDS) and X-ray diffractrometer (XRD). The results showed that the microhardness of the TiB2–Fe coating was strongly influenced by the composition of the coating materials as well as the TIG processing current. The microhardness increases with decreasing Fe contents in the coating materials with constant processing current (90 A) as well as it also increases with decreasing processing current with the fixed composition of coating materials (80TiB2–20Fe). The maximum average microhardness found was 3082 HV0.1 for the coating of 100TiB2–0Fe composition ratio and 90 A processing current which was about 18 times higher than that of the substrate average microhardness value (163 HV0.1). Average wear rate evaluated by considering weight loss of the TIG cladded samples using pin on disc tribometer by the sliding distance of 864 m and 20 N normal loads. The wear results also showed that the coating contains 100 wt% of TiB2 (0 wt% of Fe) exhibited lower rate of wear 6.74 × 10−8 g/Nm which is about 24 times lower as compared to AISI 1020 mild steel wear rate (166.31 × 10−8 g/Nm).

The effects of solvents on the physical and electrochemical properties of potassium-ion conducting polymer gel electrolytes

The aim of present work is to investigate the effect of different solvent mixed within poly (vinylidiene fluoride-hexafluoropropylene) (PVDF-HFP) based Potassium ion conducting polymer gel electrolytes. The samples are prepared using solution casting method and the comparative behavior of adding carbonate and glyme in PVDF-HFP/KClO4 matrix is investigated. Subsequently, polymer gel electrolytes are characterized using X-ray diffractometer to analyze the structural features of the electrolyte films. The XRD results reveal that the prepared electrolyte films using both solvents demonstrate semi-crystalline nature. The surface morphology is studied using scanning electron microscopy and significant changes in surface morphology of the polymer gel electrolyte films is observed on introducing carbonate and glyme solvents. Thermal properties and effects of temperature on the prepared electrolytes is examined using differential scanning calorimetry and investigations reveal significant effect of temperature on the heat flow into the polymer gel electrolytes samples. The weight loss of the electrolyte samples with temperature is studied using Thermogravimetric analysis and it is observed that carbonate and glyme based electrolyte offer weight loss of about 7–8 %. The ionic conductivity of 2.53×10−7 Scm−1 and 3.67×10−4 Scm−1 while electrochemical stability window of ∼2.5 V is obtained for both polymer gel electrolytes with carbonate and glyme based solvents. The reversibility of K-ion has been established using cyclic voltammetry measurements.

Long-term corrosion of HTGR graphite with SiC coating

When creating a Kazakhstani high-temperature gas-cooled reactor (HTGR), a type of fuel with improved graphite and its gradient protective coating based on silicon carbide (SiC) will be used. So, the purpose of this work is determination the rate and features of the long-term high-temperature corrosion of reactor graphite and its SiC coating at a temperature of 1200K and a pressure of 200-250 kPa in helium with an admixture of water and oxygen in concentrations close to the normal operation of an HTGR; development a numerical model of a corrosion experiment with the convection method of supplying the working mixture. As a result, four successive test stages lasting 30 days each (the total duration of corrosion was 120 days), the weight loss of pure graphite samples (without SiC coating) range from 1.8% to 10.4%, depending on the manufacturer. In general, the average corrosion rate of unprotected graphite corresponds to the literature data. The use of a SiC coating over graphites reduces the corrosion rate of samples by a factor of 100-500. The developed model made it possible to describe both the high-temperature corrosion processes of HTGR graphite and the dynamics of the mass transfer of all gas components throughout the entire volume of the installation during the experiment.

Biocidal Action of Chromolaena odorata Extract on Ganoderma lucidum and Sclerotium rolfsii

Fungi pose a serious threat to wood in service causing significant economic loss every year. In this study, Chromolaena odorata extract was investigated for its fungicide properties against Ganoderma lucidum and Sclerotium rolfsii. An ethanol-solvent system was used to remove the extract from ground leaves of C. odorata. Samples of Pinus caribaea wood from the base, middle, and top along the tree bole were soaked in five different concentrations (0%, 10%, 20%, 30%, and 40%) of C. odorata for three days, and preservative absorption and retention were determined. The treated woodblocks were exposed to actively growing cultures of wood-attacking fungi under laboratory conditions (27 °C and 65% RH) for 24 weeks. The range of weight loss of the untreated wood samples on exposure to both fungi showed that the wood is moderately resistant to fungal attack. However, the highest weight loss which was obtained in the control wood samples showed that C. odorata extract is effective in imparting some level of fungi resistance to the wood, and the optimal concentration level, based on this research is 30%.

Susceptibility to Degradation in Soil of Branched Polyesterurethane Blends with Polylactide and Starch.

A very important method of reducing the amount of polymer waste in the environment is the introduction to the market of polymers susceptible to degradation under the influence of environmental factors. This paper presents the results of testing the susceptibility to degradation in soil of branched polyesterurethane (PUR) based on poly([R,S]-3-hydroxybutyrate) (R,S-PHB), modified with poly([D,L]-lactide) (PLA) and starch (St). Weight losses of samples and changes in surface morphology (SEM, OM and contact angle system) with simultaneously only slight changes in molecular weight (GPC), chemical structure (FTIR and 1HNMR) and thermal properties (DSC) indicate that these materials are subject to enzymatic degradation caused by the presence of microorganisms in the soil. Chemical modification of branched polyesterurethanes with R,S-PHB and their physical blending with small amounts of PLA and St resulted in a slow but progressive degradation of the samples.

Evaluation of the effect of carboxy methyl cellulose edible coating containing Astragalus honey (Astragalus gossypinus) on the shelf-life of pistachio kernel

The aim of this study was to investigate the ability of carboxymethylcellulose (CMC) containing Astragalus honey (Astragalus gossypinus) to control rancidity and microbial spoilage of pistachio kernel during storage at room temperature without effect on their sensory properties. Pistachio kernels were coated with different Astragalus honey (0, 1 and 2%) and CMC (1%) concentrations. Samples were stored at room temperature for 120 days. Microbial and fungal counts, oxidation parameters, weight loss, and hardness of pistachio samples were increased, but moisture content and sensory scores were decreased during the storage. Pistachio kernels coated with honey (2%) and CMC (1%) had the lowest microbial and fungal counts, weight loss, peroxide, anisidine, free fatty acids, and textural hardness during the storage (P < 0.05). Pistachio kernels coated with CMC containing honey exhibited the lowest color changes. Sensory score of samples increased after coating with honey and CMC. At the end of 120 days storage, the peroxide value and free fatty acid content of the sample coated with CMC and honey (2%) were about half of what was considered an acceptable threshold. Overall, the CMC coting containing Astragalus honey could obviously extended the shelf life of pistachio kernel. However, for more details, it is recommended to investigate the shelf-life of pistachio kernel in longer period or in accelerated conditions.

Two high toughness and flame retardant DOPO-containing polybenzoxazines based on polyether-urea

In this current work, two new-style DOPO-containing benzoxazines based on polyether-urea were successfully synthesized by a modified version via three-step procedures, and the corresponding polybenzoxazines with high toughness and flame retardancy were obtained by thermal activated polymerization. The single and double DOPO-containing benzoxazines were named as BzD1 and BzD2, respectively. The corresponding polymers followed were named as PBzD1 and PBzD2, respectively. The curing behaviors of the two new benzoxazines were investigated by differential scanning calorimetry. The thermal and mechanical properties of the materials were evaluated by TGA and dynamic mechanical analysis. The flame retardant properties were elucidated via limiting oxygen index (LOI). The toughness properties were expressed by bending tests. The results showed that the Yc for PBzD1 and PBzD2 were approximately 22.2% and 24%, respectively, distinctively higher than the value 2.57% of pristine polybenzoxazine PBz1, at 800 °C in N2 atmosphere. The Tgs of PBzD1 and PBzD2 distinctly increased by 42.8 °C and 20 °C, respectively, in comparison to −35 °C for pristine PBz1. The LOI values of PBzD1 and PBzD2 were 28.5 and 31, respectively. The length and weight-loss of PBzD1 and PBzD2 samples were significantly less than that of PBz1 when they were burned in the air environmental condition. The burning behavior demonstrated that the flame retardant properties was obviously improved as DOPO was introduced. All of the three specimens of PBz1, PBzD1 and PBzD2 presented excellent flexible property.

Anti‐inflammatory and bactericidal effect of keratin/harmaline/ginkgo biloba electrospun nano fibres as band aid

This study represents the extraction of keratin from hedgehogs spines doped with Harmaline and Ginkgo Biloba, and electrospun on the surface of cotton fabric (animal rights laws were performed). The field emission scanning electron microscopy (FESEM) was used to investigate the morphology of produced keratin Harmaline Ginkgo Biloba (KHG). The thermogravimetric analysis (TGA) shows the weight loss of samples in different temperatures. The aim and goal of producing KHG on the cotton fabric surface was to use as band aid; therefore, the bactericidal and anti-inflammatory of samples were investigated. The results show that the KHG band aid has about 95% bactericidal properties against both gram-positive and gram-negative bacteria (Bacillus cereus and Escherichia coli). On the other hand, the results of oedema reduction on rats indicate that KHG band aid has good anti-inflammatory property, which is near to the indomethacin. Furthermore, the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) analyses of KHG band aid and its cell viability demonstrate that the KHG band aid has very low cytotoxicity.

Composition optimization and characterization of combustible cartridge cases with polyvinyl acetate (PVAc) as a binder

Combustible cartridge case samples composed of nitrocellulose (NC), polyvinyl acetate (PVAc), kraft cellulose (KC), dibutyl phthalate (DBP) and diphenylamine (DPA) were prepared to study their structures and chemical and mechanical properties. Taguchi’s experimental design method was used to design the experimental formulations. First, simultaneous thermogravimetry-differential scanning calorimetry (STA TG-DSC), scanning electron microscopy (SEM), Brunauer–Emmett–Teller analyser (BET), bomb calorimeter (BC), vacuum stability tester (VST) and a tensile testing machine (TTM) were employed to analyse the thermochemical characteristics, structure, explosion heat, chemical stability and compatibility, and mechanical strength of all formulated samples. Based on the analysis results, the weight loss of the combustible cartridge case sample obtained by the TG experiment was chosen as the quality characteristic. The results of the Taguchi analysis indicated that the optimal parameter combination was an NC/KC weight ratio of 80:20, an NC/PVAc weight ratio of 85:15, an additional DPB of 3.5 wt.% and a density of 1.25 g/cm3. The results of the chemical stability and compatibility test, explosion heat test and mechanical strength test show that the test samples prepared with the optimal parameter combination can meet the requirements of combustible cartridge cases. Furthermore, the combustion performance of the combustible cartridge case sample prepared with the optimal formula was measured by a high-temperature combustion furnace (HTCF) and burning rate measurement device (BRM). The experimental results indicated that the autoignition temperature and ash content were 231 °C and 0.28%, respectively. In addition, the burning rate increased with increasing combustion chamber pressure but was lower than that of ordinary gun propellants at the same pressure. These combustion characteristics can meet the quality requirement of combustible cartridge cases. Finally, an actual combustible cartridge case was prepared and verified. The result of the performance verification test indicated that the average ash content was 0.30%, which was similar to that of the previous test samples and met the quality requirement.

Effects of humidity and temperature on hydrolytic degradation of polydioxanone

AbstractThe objective of this study is to understand how humidity and temperature affect the degradation behavior of polydioxanone (PDO). After changing the degradation environments, we examined the weight loss, pH value, thermal properties, mechanical properties, morphology, and rheological properties of the PDO samples. The specimens were kept in a wet or dry condition for 12 weeks. During degradation, weight retention, pH values, tensile strength, and viscosity decreased, whereas the melting temperature () and degree of crystallinity () increased. Compared with dry samples, wet PDO samples exhibited a higher hydrolysis rate. Also, higher temperatures led to more hydrolysis. Humidity was found to decrease the molecular weight of the samples and increase the degradation rate.

Influence Mechanism of Water-Soluble Sodium on Zhundong Coal Pyrolysis.

An inherent water-soluble sodium-loaded coal sample was prepared using crown ether for this study. The pyrolysis process of an inherent water-soluble sodium-loaded coal sample and a water-soluble sodium compound-loaded coal sample was researched by thermogravimetric analysis (TGA). Also, the pyrolysis kinetics of the coal samples were analyzed and researched by the distributed activation energy model (DAEM). The results show that the inherent water-soluble sodium is mainly concentrated on coal particles, which further aggravates the degree of the pyrolysis reaction. The presence of sodium can promote the weight loss of coal samples in the preliminary stage of pyrolysis and the thermal condensation stage, block the escape of volatile matter during the main pyrolysis period, and inhibit the process of graphitization of char. The activation energy of pyrolysis increases with the carbon conversion rate, and the presence of sodium can reduce the activation energy under the same carbon conversion rate.

Analytical composition of flours through thermogravimetric and rheological combined methods

The suitability of thermogravimetric analysis (TGA) and rheology for predicting analytical composition of flour was verified. The percentage weight loss of flour samples in different temperature ranges and their analytical composition determined following the American Association of Cereal Chemists (AACC) approved methods were correlated. The moisture content determined by AACC method showed a strong correlation with the weight loss of dried samples in the temperature range 30 – 125°C. Similarly, the weight loss of fully swollen samples, determined by TGA in the temperature range of 30 – 125°C, perfectly correlated with the water-Solvent Retention Capacity (w-SRC) determined by standard method (AACC). The weight loss in the range 200 – 400°C revealed a good correlation with the starch content, while the weight loss in the range 400 – 600°C correlated with the gluten content. Finally, the so-called residue at 600°C (usually attributable to mineral content) correlated with the ash content (AACC standard method). The rheological parameters (G', G'' and tan δ) also showed a strong correlation with the analytical composition of analyzed flours. A perfect correlation was observed between the mineral content and the elastic modulus, as well as between both G' and G'' and the starch content. As the resilience of dough samples strongly depends on the relative amount of gliadins and glutenins, a strong correlation between the Gli/Glu ratio and tan δ was also found.