Acetone Acid Research Articles

Thermodynamic functions of succinic acid in acetone–water binary mixtures based on computation of KI & KII constants

Succinic acid is commonly used in various chemical, pharmaceutical, environmental and industrial activities and its reactivity is principally determined by the pK(I & II) values. Therefore, the dissociation constants of succinic acid have been determined in this study on the basis of emf measurements in both different acetone mole fractions and temperature range. The pK(I or II) values of the studied acids in acetone aqueous media were found higher than those obtained in other organic aqueous media with the same conditions (temperature and mole fraction of solvent). Moreover, (KI/KII) in 40 wt% acetone–water mixture was identified to follow succinic acid < malic acid < malonic acid < maleic acid owing to the stabilization of intramolecular hydrogen bonding. The free energy of transfer (ΔG0I or II) for succinic acid was increased with the increasing of pKI or pKII values due to the decrease in relative permittivity (εr) via increment of the acetone fraction in the aqueous medium. The trend of ΔS°I value among the studied acids were found to follow maleic < malic < succinic < malonic. ΔS°II values were characterized lower than ΔS°I due to possible solvent interactions with the acid anion (L2-). Therefore, ΔH°II values of the second dissociation process were identified lower than ΔH°I to favor an exothermic reaction.

Effect of Surface Treatment of Tire Rubber on the Tensile Properties of Ground Tire Rubber/Epoxy Composites

The present work investigates the effect of surface treatment of ground tire rubber (GTR) waste on the tensile properties of GTR /epoxy composites. The GTR was treated using 10 wt% alkali solution and 1 wt% stearic acid in acetone. It was found that the treated GTR decreased the tensile strength, about 4.8 and 2.9% for NaOH-and stearic acid-treated GTR, respectively, compared to the untreated GTR. Nevertheless, the treated rubber increased the elastic modulus of the epoxy composites, about 5.2 and 9.3% for the NaOH-and stearic acid-treated GTR, respectively, compared to the untreated GTR. The strain at break and the absorbed energy of the treated GTR/epoxy composites were lower than the untreated GTR, consistent with the increase of elastic modulus for the treated GTR. Scanning electron microscopy revealed that the bonding of the stearic acid-treated GTR-matrix was good, indicating better interfacial strength than the untreated and alkali-treated GTR-epoxy matrix.

Potentiometric Study of Complexation in a Copper(II)–1-Phenyl-2,3-dimethylpyrazoline-5-thione–Hydrochloric Acid–Acetone System

Potentiometric Study of Complexation in a Copper(II)–1-Phenyl-2,3-dimethylpyrazoline-5-thione–Hydrochloric Acid–Acetone System

Self-Diffusion of Ferulic and Sinapic Acids in the Binary Carbon Tetrachloride–Acetone-d6 System

1H NMR with a pulsed magnetic field gradient method are used to measure the coefficients of self-diffusion of ferulic and sinapic acids in binary carbon tetrachloride–acetone-d6 solvent at temperatures of 278 and 298 K. Data show that the acids’ coefficients of self-diffusion grow along with the concentration of acetone-d6 and temperature. It is shown that the effective hydrodynamic radii of acids do not depend on the composition of the binary solvent within the experimental error. In light of molecular association, this behavior can be explained by the competition between two processes: acid–acetone heteroassociation and acid–acid self-association.

Potentiometric Study of Complexation in a Copper(II)–1-Phenyl-2,3-dimethylpyrazoline-5-thione–Hydrochloric Acid–Acetone System

Potentiometry is used to study the formation of Cu(II)–1-phenyl-2,3-dimethylpyrazoline-5-thione (1-P-2,3-DMP-5-T) complex in a mixed solvent. The compositions of the complexes are determined, and their stepwise constants of stability are calculated. It is shown that when Cu(II) reacts with 1-P-2,3-DMP-5-T in a medium of mixed solvent HCl + acetone (10 : 1), quantities ΔH, ΔG, and ΔS have negative values at all stages.

Fabrication of carbon dots intercalated MXene hybrids via laser treatment as oil-based additives for synergistic lubrication

As an emerging two-dimensional material, MXene exhibits excellent anti-friction and anti-wear properties in lubrication systems. However, as an oil-based lubricant additive, their stable dispersion in base oil still faces great challenges. Optimizing the microstructure has been proved to be an effective strategy to improve the stable dispersion of MXene in base oil. In this work, catechol groups functionalized carbon dots are synthesized successfully by pulsed laser irradiation of tannic acid in acetone, and then they are grafted onto MXene surface to obtain MXene@CDs hybrids via chemical bond between catechol groups of carbon dots and Ti–OH of MXene surface. Carbon dots not only increase the layer spacing of MXene nanosheets, reduce self-weight stacking, but also make it easier to slide between layers. When used as oil based lubricating additives, MXene@CDs can reduce the coefficient of friction of PAO 10 from 0.58 to 0.1, and the wear volume is reduced by 91.3%. Due to the shear-induced and self-healing mechanism, the special intercalation structure of MXene@CDs is easily formed a protective film during the run-in period, which not only reduces the contact area of friction couples but also eliminates the polishing effect on the substrate surface, thus enabling synergistic lubrication.

Experiments and Kinetic Modeling of Fructose Dehydration to 5-Hydroxymethylfurfural with Hydrochloric Acid in Acetone–Water Solvent

Experiments and Kinetic Modeling of Fructose Dehydration to 5-Hydroxymethylfurfural with Hydrochloric Acid in Acetone–Water Solvent

Extracción de proteínas secretadas por el fitopatógeno Macrophomina phaseolina: Selección de un método eficiente que incluye estímulo con tejido de su hospedero

The globally distributed necrotrophic fungus Macrophomina phaseolina is the causal agent of economically important crop diseases such as soybean charcoal rot. This fungus secretes a wide variety of proteins and metabolites that allow it to invade the plant and initiate the infection process. The role of fungi secreted proteins with hydrolytic activity in the infection process has been extensively studied; proteins without enzymatic activity could also play an important role in this process. The analysis of total proteins would allow to broaden the knowledge about this pathogen and establish more efficient strategies for its control. The objective of the present work was to evaluate three methods for the extraction of proteins secreted by M. phaseolina. The fungus was grown in potato dextrose broth (PDB) and Czapek-Dox (CZP) with and without soybean leaf supplementation. Proteins were extracted from the lyophilized filtrate of PDB medium using three extraction methods and analyzed by SDS-PAGE. The protein precipitation with trichloroacetic acid in acetone was selected because it showed a better resolution of the protein profile. The filtrate of M. phaseolina grown in PDB supplemented with soybean (MpPDBs) presented the highest yield of protein extraction of secreted proteins among all conditions evaluated. The protein profiles of PDB medium with and without supplementation showed seven differential bands, one of the specific, detected in MpPDBs. These results constitute a basis for studies on the implication of proteins secreted by the fungus in the infection process.

LC‐ESI‐MS/MS‐based phytochemicals and cytotoxic, antioxidant, and enzyme inhibitory activities ofScorzonera mollissubsp. szowitzii: A new reserve of bioactive compounds

Scorzonera L. species are important species used in folk medicine against as hypertension, arteriosclerosis, diabetes, kidney diseases, and rheumatism. In this study, phytochemical compounds, cytotoxic (against DLD-1 (colorectal cancer) and CCD-18Co (human colon fibroblast cell line)), antioxidant and enzyme inhibitory (against cholinesterases, tyrosinase, urease, α-amylase, and α-glucosidase) activities of various extracts of Scorzonera mollis subsp. szowitzii were investigated. LC-ESI-MS/MS analysis led to screen 56 phytochemical compounds with predominance of chlorogenic acid in acetone (0.118 ± 0.010 μg/mg) and methanol (34.105 ± 0.012 μg/mg) extracts and gallic acid (0.153 ± 0.008 μg/mg) in water extract. The methanol extract showed superior cytotoxic activity on DLD-1 with IC50 value of 19.46 ± 0.36 μg/ml. The highest antioxidant activity was recorded in methanol extract in β-carotene linoleic, DPPH•, ABTS•+, CUPRAC, and phosphomolybdenum assays with IC50 values of 16.23 ± 0.98, 68.55 ± 0.24, 40.32 ± 0.27, 241.66 ± 0.01, and 95.65 ± 0.78 μg/ml, respectively. All extracts exhibited varying degrees of enzyme inhibitory activity, while hexane extract (89.18 ± 0.84%) showed a degree of urease inhibitory activity to exceed the standard (78.93 ± 0.18%). Novelty impact statement Since the side effects of synthetic origin drugs have reached levels that cannot be ignored, the interest in scientific studies on plants and their bioactive properties has deepened. In this study, it was planned to investigate the phytochemical profile and bioactive properties of S. mollis subsp. szowitzii, a member of Scorzonera genus used as food and drugs in traditional medicine. In addition to being the first to point out the potential of S. mollis subsp. szowitzii as a natural food additive, this study proved its medicinal importance by uncovering bioactive compounds and properties.

THERAPEUTIC INDICES OF SOME ANTIFUNGAL ORGANIC COMPOUNDS

Objective: The objective of the study was to evaluate the therapeutic indices (TIs) some antifungal organic compounds and to compare their safety.&#x0D; Methods: TIs of 55 organic compounds were evaluated by dividing their mammalian toxicity values given as median lethal doses ([mg/kg] rat, oral) collected from literature by experimentally determined fungitoxicity values evaluated as median effective concentration (EC50 [mg/L]) for the mycelial growth inhibition of Colletotrichum gloeosporioides on potato dextrose agar medium.&#x0D; Results: Large variations in TIs are observed in different classes of compounds, namely, alcohols, carboxylic acids, phenols, esters, and aldehydes. The relationship between carbon chain length of saturated monohydric alcohols and mammalian toxicity shows that toxicity increases from chain length 1 to 5, declines from 5 to 6, increases from 6 to 7, and steadily declines from 7 to 10. Thus, the relationship is by and large parabolic. The relationship between carbon chain length and molar antifungal activity is also parabolic. In spite of this, large differences are found in TIs making 1-decanol (TI=42.1) a very safe antifungal compound and 1-pentanol (TI=0.17) a hazardous antifungal compound. This is because mammalian toxicity reaches a maximum around carbon chain length of 5, while in the case of antifungal activity, it reaches a maximum around carbon chain length of 10.&#x0D; Conclusions: Among the 55 compounds, whose TIs were evaluated, some compounds with high TIs (&gt;10) which can be considered safe as antifungal compounds are citronellol, geraniol, 1-decanol, 1-octanol, phenyl acetaldehyde, methyl anthranilate, 1-naphthol, 2-naphthol, and propionic acid. Some compounds with low TIs (&lt;0.50) which can be considered hazardous as antifungal compounds are resorcinol, hydroquinone, oxalic acid, and acetyl acetone.

Реакция пентафенилфосфора с гексахлороплатиновой кислотой

Tetraphenylphosphonium hexachloroplatinate (1) was synthesized by the interaction of pentaphenylphosphorus with hexachloroplatinic acid in acetone. The recrystallization of complex 1 from dimethylsulfoxide gave tetraphenylphosphonium dimethylsulfoxidopentachloroplatinate (2). The compounds have been characterized by IR-spectroscopy and X-ray analysis. The absorption bands characterizing stretching vibrations of the phenyl groups are present in the IR spectra, recorded on a Shimadzu IRAffinity-1S Fourier spectrometer in the 4000–400 cm–1 area in KBr pellets. According to the X-ray analysis, the compound unit cell parameters are: triclinic syngony, space group (1, 2), а = 10.205(10), b = 10.970(15), c = 12.160(11) Å (1), а = 7.7667(4), b = 13.3069(7), c = 14.2562(7) Å (2), a = 73,65(4)°, β = 80.64(3)°, g = 77.48° (1), a = 80.972(4)°, β = 88.205(4)°, g = 89.199(4)° (2), V = 1272(2) Å3 (1), 1454.38(13) Å3 (2). The crystals of complexes 1 and 2 consist of the tetrahedral tetraphenylphosphonium cations and octahedral anions. In cations the phosphorus atoms have a slightly distorted tetrahedral environment (the CPC angles are 107.8(3)-113.2(3)° (1), 105.9(3)–112.9(3)° (2), the P-C distance is 1.785(6)-1.805(6) Å (1), 1.783(7)–1.791(6) Å (2). Platinum atoms in the anions of complexes 1 and 2 are hexacoordinated. In complex 2 the dimethyl sulfoxide ligand is coordinated with the Pt atom via the sulfur atom 2.290(2) Å. Complete tables of coordinates of atoms, bond lengths and valence angles are deposited at the Cambridge Structural Data (CCDC 1865783, 829586 http://www.ccdc.cam.ac.uk).

Electrochemical Behavior of an Amorphous Alloy in an Ionic Liquid and in Aqueous Media

A study is performed of the effect pretreatment with solutions of benzoic acid in an organic solvent has on the result from the electrochemical oxidation of amorphous alloy Fe70Cr15B15 in an ionic liquid 1‑butyl-3-methylimidazolium tetrafluoroborate. It is established that the nature and properties of surface oxide films affect the result from the electrochemical oxidation of the alloy in an ionic liquid. Partial removal of oxide films by a solution of benzoic acid and subsequent electrooxidation in an ionic liquid reveals a nano-cellular structure on the electrode’s surface. It is shown that preliminarily treating the alloy with a saturated solution of benzoic acid in acetone results in a considerable anodic shift in the corrosion potential and the formation of a more effective protective coating.

Evaluación de metodologías para el análisis de perfil de proteínas secretadas por aislados de Trichoderma spp. al medio de cultivo

Los hongos del género Trichoderma son ampliamente utilizados como agentes de control biológico para controlar diversos fitopatógenos, sin embargo, muchas moléculas implicadas en el biocontrol aún se desconocen. Existen numerosos trabajos en los cuales se evalúan las moléculas secretadas por el hongo, entre las que se encuentran las proteínas. Para evaluar estas moléculas se deben extraer del sistema experimental en el cual crece el hongo, y la metodología de extracción, la cual es altamente dependiente de diversos factores, requiere el ajuste de las condiciones experimentales. Así, se planteó la evaluación de dos metodologías para el análisis del perfil de proteínas secretadas por aislados de Trichoderma spp. al medio de cultivo, partiendo de filtrado sin liofilizar y liofilizado. Los perfiles proteicos obtenidos a partir de material liofilizado, aplicando la precipitación de proteínas con ácido tricloacético en acetona seguida de una limpieza con metanol y cloroformo, generó un perfil adecuado para el análisis de las proteínas secretadas al medio de cultivo.

Synergistic Extraction and Characterization of Fulvic Acid by Microwave and Hydrogen Peroxide-Glacial Acetic Acid to Oxidize Low-Rank Lignite.

Fulvic acid (FA) has important properties and is used widely in agriculture, industry, medicine, and other fields. However, there is a lack of environmentally friendly and efficient extraction methods for coal-based FA and its molecular structural characterization. In this study, FA was extracted cleanly and efficiently from low-rank lignite via the innovative method of microwave combined with hydrogen peroxide and glacial acetic acid, followed by purification by the sulfuric acid–acetone method. The molecular structures of FA were precisely characterized by UV–vis spectroscopy, infrared (IR) spectroscopy, 1H nuclear magnetic resonance (NMR) spectroscopy, and gas chromatography–mass spectrometry (GC–MS). The results showed that the microwave combined with hydrogen peroxide–glacial acetic acid method had stronger oxidative degradation ability compared with the conventional method. Under optimized conditions, the yield of FA reached 60.97%. During the oxidation process, the macromolecular network structure of coal was destroyed, resulting in the production of many oxygen-containing functional groups. According to the IR and UV–vis spectra, there were abundant oxygen-containing functional groups such as hydroxyl, carboxyl, carbonyl, and quinone groups in the molecular structure of FA. Determination of the total acid group content in the oxygen-containing functional groups of FA showed that the content of carboxyl groups was much higher than that of phenolic hydroxyl groups. The 1H NMR showed that there were hydrogen atoms present as part of carboxyl, aromatic, phenolic hydroxyl, and aliphatic groups in FA. The (GC–MS) results suggested that FA is a mixture of dozens of complex compounds, including alkanes, alcohols, esters, etc.

Design of a new multi-functional catalytic system Ni/SO3H@zeolite-Y for three-component synthesis of N-benzo-imidazo- or -thiazole-1,3-thiazolidinones.

In this investigation, a nanoporous zeolite-NaY supported sulfonic acid was synthesized and Ni(ii) ions were successfully stabilized on SO3H@zeolite-Y (Ni/SO3H@zeolite-Y). This novel type of zeolitic nanocomposite was characterized using various techniques including FT-IR, FE-SEM, TGA, BET and EDX. Ni/SO3H@zeolite-Y was used as a multi-functional and highly active nanocatalyst for the three-component synthesis of 3-benzimidazolyl-1,3-thiazolidin-4-ones and new 3-benzthiazoleyl-1,3-thiazolidin-4-ones via cyclocondensation of 2-aminobenzimidazole or 2-aminobenzothiazole, aromatic aldehydes and thioglycolic acid in acetone–H2O at room temperature. This economical chemical procedure has advantages such as excellent yield in short reaction times, convenient manipulation and high purity of products, applicability to a broad range of substrates, and the use of a nontoxic and heterogeneous acid catalyst with good reusability.

DENDROBENTHAMIDIA CAPITATA (WALL.) HUTCH. FRUIT (BHOMORA): AN OPULENT SOURCE OF POLYPHENOLS WITH ANTIOXIDANT, ANTI-ELASTASE, ANTI-COLLAGENASE, AND ANTI-TYROSINASE ACTIVITIES FROM INDIAN HIMALAYAN REGION

Dendrobenthamidia capitata (Wall.) Hutch. fruit (Bhamora) is a popular yet underexplored wild edible fruit of Uttarakhand state of Indian Himalayan region. Therefore, the present study was aimed to analyze D. capitata fruit for its phenolic contents, antioxidant, anti-elastase, anti-collagenase, and anti-tyrosinase activities using in- vitro assays. Phenolics and flavonoids were extracted using 80 % aqueous acetone and acid acetone as solvents. Our analysis revealed high values of total phenolic contents of 4.38±0.08 mg gallic acid equivalents (GAE). g-1 fruit weight and total flavonoid contents of 7.47±0.66 mg catechin equivalents (CE). g-1 fruit weight in the acid acetone fruit extracts of D. capitata. D. capitata fruit extracts demonstrated remarkable antioxidant activities (ABTS+, 1,1- diphenyl-2-picrylhydrazyl, superoxide anion, linoleate peroxyl radicals scavenging, and ferric reducing activities) and notable anti-elastase, anti-collagenase, and anti-tyrosinase activities. High resolution liquid chromatography– mass spectroscopy analysis revealed presence of six phenolic compounds, namely, dihydrorobinetin, dhydromyricetin, retusin dimethyl ether, rotenone, bergenin (C-glycoside of 4-O-methyl gallic acid) and peucenin in fruit extracts. This study recommends utilization of D.capitata fruit as functional food with prospective pharmaceutical, nutraceutical, and cosmeceutical properties.

DENDROBENTHAMIDIA CAPITATA (WALL.) HUTCH. FRUIT (BHOMORA): AN OPULENT SOURCE OF POLYPHENOLS WITH ANTIOXIDANT, ANTI-ELASTASE, ANTI-COLLAGENASE, AND ANTI-TYROSINASE ACTIVITIES FROM INDIAN HIMALAYAN REGION

Dendrobenthamidia capitata (Wall.) Hutch. fruit (Bhamora) is a popular yet underexplored wild edible fruit of Uttarakhand state of Indian Himalayan region. Therefore, the present study was aimed to analyze D. capitata fruit for its phenolic contents, antioxidant, anti-elastase, anti-collagenase, and anti-tyrosinase activities using in- vitro assays. Phenolics and flavonoids were extracted using 80 % aqueous acetone and acid acetone as solvents. Our analysis revealed high values of total phenolic contents of 4.38±0.08 mg gallic acid equivalents (GAE). g-1 fruit weight and total flavonoid contents of 7.47±0.66 mg catechin equivalents (CE). g-1 fruit weight in the acid acetone fruit extracts of D. capitata. D. capitata fruit extracts demonstrated remarkable antioxidant activities (ABTS+, 1,1- diphenyl-2-picrylhydrazyl, superoxide anion, linoleate peroxyl radicals scavenging, and ferric reducing activities) and notable anti-elastase, anti-collagenase, and anti-tyrosinase activities. High resolution liquid chromatography– mass spectroscopy analysis revealed presence of six phenolic compounds, namely, dihydrorobinetin, dhydromyricetin, retusin dimethyl ether, rotenone, bergenin (C-glycoside of 4-O-methyl gallic acid) and peucenin in fruit extracts. This study recommends utilization of D.capitata fruit as functional food with prospective pharmaceutical, nutraceutical, and cosmeceutical properties.

Abstract 241: An efficient cell-based assay for quantification of cellular polysialic acid in neuroblastoma

Abstract Introduction Polysialic acid (polySia) decorates the surface of NCAM (neuronal cell adhesion molecule) on neuroendocrine tumors, notably neuroblastoma and small cell lung cancer, and is strongly associated with poor prognosis and aggressive disease in patients in the clinic [1]. PolySia modulates tumor cell-cell and cell-matrix adhesion, migration, invasion and metastasis. SiRNA knockdown of polysialyltransferase (polyST) ST8SiaII, the enzyme primarily responsible for polySia synthesis in tumors, abrogates tumor cell migration and invasion. PolyST is a selective and largely unexplored therapeutic target for neuroblastoma dissemination [1]. Methods and Results We describe the development of a cell-based assay that quantifies the formation of polySia on the cell surface of neuroblastoma cells. This is a sensitive assay that detects the polySia that is released after pH adjustment, organic precipitation and acid hydrolysis. PolySia was first separated from cell lysate by mild acid hydrolysis and acetone precipitation. It was then purified by ethanol precipitation. We further analysed the role of lactonisation of polySia during organic precipitation. The purified polySia is further hydrolysed into sialic acid monomers, followed by DMB labelling and RPLC-fluorescence analysis. This method was validated by analysis of polySia in C6-ST8SiaII cells, following treatment with Endo-NF in a various concentrations. This method proved to be useful to assess polySia changes after treatment of cells with novel polyST inhibitors. The effect of lactonisation of polySia during organic precipitation was also investigated. It was found that lactonised polySia was mainly soluble in 90% acetone/90% ethanol, while natural polySia (non-lactonised) can be precipitated by ethanol in the presence salts. Based on the different solubility of polySia, a cost-efficient assay was designed to purify polySia released from cells with a low level of non-polySia-derived sialic acid contamination before further acid hydrolysis. With this method we quantified the different levels of cell-surface polySia-derived sialic acid between polySia-positive and polySia-negative cell lines. Furthermore, we successfully validated this method by Endo-NF treatment in C6-ST8SiaII cells: the EC50 of Endo-NF digestion of polySia in C6-ST8SiaII cells was approximately 5.4 pM. The assay has been successfully utilised to evaluate novel polyST inhibitors in vitro. [1] Falconer, R.A. et al., Curr. Cancer Drug Targets, 2012, 12, 925-939; [2] Al-Saraireh YMJ et al., PLoS ONE, 2013, 8:e73366. Citation Format: Xiaoxiao Guo, Francis Mprah Barnieh, Jodie Malcolm, Amanda D Race, Goreti Ribeiro Morais, Steven D Shnyder, Paul M Loadman, Laurence H Patterson, Robert A. Falconer. An efficient cell-based assay for quantification of cellular polysialic acid in neuroblastoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 241.

Self-Diffusion Coefficients of Coumaric and Caffeic Acids in Tetrachloromethane–Acetone-d6 Mixtures

The self-diffusion of p-coumaric and caffeic acids in a binary tetrachloromethane–acetone-d6 solution at low concentrations of the dissolved compound is studied via pulsed field gradient-spin echo 1H NMR at 278 and 298 K. According to the results, the self-diffusion coefficients of caffeic acid are lower than those of p-coumaric acid. The hydrodynamic radii of the acids in tetrachloromethane, calculated using the Stokes–Einstein equation, are lower than those in acetone-d6. This behavior is due to an increase in the degree of acid–acetone heteroassociation. Molecular association is also apparent from changes in the chemical shifts of protons in carboxyl and hydroxyl groups within molecules of the studied acids.

О полифункциональности высокоосновных анионитов

Методом потенциометрического титрования в высокоосновном анионите АВ-17-8 установлено наличие трех типов функциональных групп. Определены константы их ионизации: pKb1=1.72÷1.78; pKb2=4.32÷4.38; pKb3=7.72÷7.82. В ионный обмен с кремниевыми кислотами вступают две функциональные группы с меньшими величинами pKb. Доля слабоосновных групп (с pKb3=7.72÷7.82) в разных партиях анионита достигает 12-34 % от полной обменной емкости. Полифункциональность анионита АВ-17-8 нужно учитывать при обсуждении различных закономерностей ионообменных процессов, а также при прогнозировании сорбции анионов слабых органических и минеральных кислот.