Graphitized Carbon Black Research Articles

Simultaneous determination of neutral, basic and acidic pesticides in aquatic environmental matrices by solid-phase extraction and liquid chromatography electrospray ionization mass spectrometry

Simultaneous determination of a wide variety of pesticides and herbicides in environmental waters by liquid chromatography electrospray-ionization mass spectrometry (LC-ESI-MS) has been a challenging task due to matrix interferences. In this study, deuterated analogues and graphitized carbon black (GCB) solid-phase extraction (SPE) were investigated to compensate for and eliminate sample matrix interferences. Significant ion suppression and enhancement were observed when deuterated pesticides were used as internal standards. GCB cartridges can well retain neutral, basic and acidic pesticides and herbicides but the complete elution requires a combination of different characteristics of the solvent. A new procedure for SPE extraction and sample preparation was developed for simultaneous determination of neutral, basic pesticides and phenoxy acid herbicides in environmental waters by LC-ESI-MS. The proposed method was validated by examining the limit of detection and range of linearity and testing river water samples. The limit of detection ranged between 0.005 and 2 μg L−1 and the correlation coefficient for 5–5000 μg L−1 calibration standards was greater than 0.995. The recoveries of 79–121% from river water samples and relative standard deviations of 2–21% were obtained at the concentrations of 0.4–500 μg L−1 for 37 pesticides and herbicides.

Effect of the state of distribution of supported Pt nanoparticles on effective Pt utilization in polymer electrolyte fuel cells

In polymer electrolyte fuel cells, it is essential to minimize Pt loading, particularly at the cathode, without serious loss of performance. From this point of view, we will report an advanced concept for the design of high performance catalysts and membrane-electrode assemblies (MEAs): first, the evaluation of Pt particle distributions on both the interior and exterior walls of various types of carbon black (CB) particles used as supports with respect to the "effective surface (ES)"; second, control of both size and location of Pt particles by means of a new preparation method (nanocapsule method); and finally, a new evaluation method for the properties of MEAs based on the Pt utilization (UPt), mass activity (MA), and effectiveness of Pt (EfPt), based on the ES concept. The amounts of Pt catalyst particles located in the CB nanopores were directly evaluated using the transmission electron microscopy, scanning electron microscopy and corresponding three-dimensional images. By use of the nanocapsule method and optimization of the ionomer, increased MA and EfPt values for the MEA were achieved. The improvement in the cathode performance can be attributed to the sharp particle-size distribution for Pt and the highly uniform dispersion on the exterior surface of graphitized carbon black (GCB) supports.

Temperature Dependence of Oxygen Reduction Reaction Activity at Stabilized Pt Skin-PtCo Alloy/Graphitized Carbon Black Catalysts Prepared by a Modified Nanocapsule Method

We have developed a new catalyst supported on graphitized carbon black (GCB), which exhibits higher resistance to carbon corrosion than a conventional carbon black (CB), in order to favor both high mass activity for the oxygen reduction reaction (ORR) and high durability. To protect the underlying Pt(X)Co alloy from corrosion and maintain the modified electronic structure, two monolayers of Pt-skin layer (Pt(2ML)) were formed on the Pt(X)Co core-particles, which were of uniform size and composition. Characterization of the Pt(2ML)-PtCo(X = 1)/GCB, both by a scanning transmission electron microscope (STEM) with an energy dispersive X-ray (EDX) analyzer and by X-ray diffraction (XRD), indicated the formation of the Pt(2ML) on the PtCo alloy solid solution nanoparticles. The temperature dependence of the ORR activity of the Pt(2ML)-PtCo((2nm))/GCB catalyst was evaluated from the hydrodynamic voltammograms in O(2)-saturated 0.1 M HClO(4) solution at 30-90 °C by the channel flow double electrode (CFDE) technique. It was found that the Co dissolution from PtCo particles during the ORR was considerably suppressed by the stabilized Pt-skin structure. The kinetically controlled mass activity (MA(k)) for the ORR at the Pt(2ML)-PtCo((2nm))/GCB at E = 0.85 V vs reversible hydrogen electrode (RHE) was about two times larger than that for a standard commercial c-Pt/CB catalyst at 80-90 °C. The value of H(2)O(2) yield at the Pt(2ML)-PtCo((2nm))/GCB was found to be very low (0.2%), about one-half of that for c-Pt/CB, and it is thus better able to mitigate the degradation of the polymer electrolyte membrane and gasket material.

Determination of 250 pesticide residues in vegetables using QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry

A multiresidue analytical method for the determination of 250 pesticide residues in vegetables was developed by using QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The target compounds were extracted with acetonitrile containing 1% (v/v) acetic acid, purified by a mixed sorbent of MgSO4, primary secondary amine (PSA), graphitized carbon black (GCB) and C18, separated on a Waters ACQUITY™ UPLC BEH C18 column (100 mm x 2. 1 mm, 1.7 µm) and detected by UPLC-MS/MS. Anhydrous magnesium sulfate was used as a dewatering agent. The effects of the amounts of MgSO4, PSA, GCB and C18 added on the recoveries of 250 pesticides were investigated. The results showed that the purification effect was best when 300 mg MgSO4, 200 mg PSA, 10 mg GCB and 100 mg C18 in 2 mL of the extract were added. For the 250 pesticide residues, the limits of detection (LODs) of the method were from 0. 01 to 50. 00 g/kg. The recoveries obtained ranged from 60. 1% to 120% at three spiked levels in Chinese chives with the relative standard deviations between 3. 5% and 19. 5% using matrix matched external standard method. The results showed that the method is able to meet requirements of the multiresidue detection of the 250 pesticides in vegetable. The method has the advantages of rapidity, simplicity, high sensitivity and better purification effect. It is suitable for the rapid determination of the common pesticides in vegetables, and it provides a strong guarantee for the risk assessments of the quality and safety of vegetables.

Simultaneous determination of five pyrazole fungicides in cereals, vegetables and fruits using liquid chromatography/tandem mass spectrometry

The sensitive analytical method using quick, easy, cheap, effective, rugged, and safe (QuEChERS) procedure for simultaneous determination of five novel pyrazole fungicides residues in cereals (rice and wheat), vegetables (cucumber, tomato, and lettuce), and fruits (apple and grape) was developed by liquid chromatography coupled with tandem mass spectrometry (LC–MS/MS). The five pyrazole fungicides (bixafen, fluxapyroxad, furametpyr, pyraclostrobin, and rabenzazole) were extracted from seven matrices using acetonitrile and subsequently cleaned up by octadecylsilane (C18) or graphitized carbon black (GCB) prior to LC–MS/MS analysis. The determination of the target compounds was achieved in less than 3.0min using an electrospray ionization source in positive mode (ESI+) for furametpyr, pyraclostrobin, and rabenzazole, while negative mode (ESI−) for bixafen and fluxapyroxad. The method showed excellent linearity (at least R2≥0.990) for all studied analytes. The limits of detection were below 3.0μgkg−1, and the limits of quantification did not exceed 9μgkg−1 in all matrices. The overall average recoveries in rice, wheat, cucumber, tomato, lettuce, apple, and grape at three levels (10, 100 and 1000μgkg−1) were ranged from 70.0% to 108% with all RSDs values less than 20.9% for all analytes. The method is demonstrated to be convenient and reliable for the routine monitoring of pyrazole fungicides in cereals, vegetables and fruits.

Comparative study of different clean-up techniques for the determination of λ-cyhalothrin and cypermethrin in palm oil matrices by gas chromatography with electron capture detection

Solid phase extraction (SPE) and dispersive solid-phase extraction (d-SPE) were compared and evaluated for the determination of λ-cyhalothrin and cypermethrin in palm oil matrices by gas chromatography with an electron capture detector (GC-ECD). Several SPE sorbents such as graphitised carbon black (GCB), primary secondary amine (PSA), C(18), silica, and florisil were tested in order to minimise fat residues. The results show that mixed sorbents using GCB and PSA obtained cleaner extracts than a single GCB and PSA sorbents. The average recoveries obtained for each pesticide ranged between 81% and 114% at five fortification levels with the relative standard deviation of less than 7% in all cases. The limits of detection for these pesticides were ranged between 0.025 and 0.05 μg/g. The proposed method was applied successfully for the residue determination of both λ-cyhalothrin and cypermethrin in crude palm oil samples obtained from local mills throughout Malaysia.

Dispersive Cleanup of Acetonitrile Extracts of Tea Samples by Mixed Multiwalled Carbon Nanotubes, Primary Secondary Amine, and Graphitized Carbon Black Sorbents

A method for analysis of 37 pesticide residues in tea samples was developed and validated and was based on reversed-dispersive solid-phase extraction (r-DSPE) cleanup in acetonitrile solution, followed by liquid chromatography-electrospray tandem mass spectrometry determination. Green tea, oolong tea, and puer tea were selected as matrixes and represent the majority of tea types. Acetonitrile was used as the extraction solvent, with sodium chloride and magnesium sulfate enhancing partitioning of analytes into the organic phase. The extract was then cleaned up by r-DSPE using a mixture of multiwalled carbon nanotubes, primary secondary amine, and graphitized carbon black as sorbents to absorb interferences. Further optimization of sample preparation and determination allowed recoveries of between 70% and 111% for all 37 pesticides with relative standard deviations lower than 14% at two concentration levels of 10 and 100 μg kg(-1). Limits of quantification ranged from 5 to 20 μg kg(-1) for all pesticides. The developed method was successfully applied to the determination of pesticide residues in market tea samples.

Matrix effect in pesticide analysis by ultra fast liquid chromatography coupled to mass spectrometry

In this work a study of several variables that affect the matrix effects (ME) was performed. The choice was given among four extraction solvents and four different clean-up methods which were compared in order to find the method that produces least ME and gives the highest response for 18 compounds. Variability of ME under identical chromatographic conditions for five fruits was also studied. Finally we evaluated different analyte/matrix ratios to assess the ME. The results showed that the significantly better responses (P < 0.05) were achieved by using the mixture of three absorbents and the use of only Graphitized Carbon Black causes greater suppression of ionization. From the five matrices tested it was found that grapes and tomatoes extract induced a larger ME, meanwhile the use of apple and mango matrices gave responses more like matrix-free standards. Finally, a negative correlation between the suppression of ionization and the compound/matrix ratio was found.

Electrochemical and Raman spectroscopic evaluation of Pt/graphitized carbon black catalyst durability for the start/stop operating condition of polymer electrolyte fuel cells

The durability of Pt nanoparticle catalysts and two types of carbon supports, carbon black (CB) and graphitized carbon black (GCB), for 50 wt% Pt-loaded catalysts (commercial Pt/CB, and Pt/GCB, heat treated (HT) Pt/GCB, and an in-house-prepared nanocapsule Pt/GCB) was evaluated by electrochemical and Raman spectroscopic methods. The Pt-loaded carbon catalysts were tested by means of a standard potential step protocol (0.9 V ↔ 1.3 V vs. RHE, holding 30 s at each potential and taking 1 min for one cycle, 3000 potential cycles for commercial Pt/CB and 10,000 cycles for commercial Pt/GCB, Pt/GCB-HT, and nanocapsule Pt/GCB) in membrane-electrode assemblies at 65 °C with 100% RH H2 (anode) and N2 (cathode). Slower degradation of the electrochemically active surface area (ECA) and smaller mass activity losses before vs. after durability testing for Pt/GCB compared to CB revealed the higher corrosion resistance of GCB. Changes in the Raman spectra were clearly detected between the Pt/GCB catalyst before and after durability testing, while only slight differences of spectra were found for commercial Pt/CB during durability testing. The degradation degree of the graphitized carbon black support was successfully evaluated from changes in the band area ratio of the G band (ca. 1575 cm−1) to the D1 band (ca. 1325 cm−1), which were estimated from curve fitting of the spectra. It was found that the type of support material, Pt nanoparticle size, as well as its dispersion state on the support, affected the degradation properties of the catalysts. The results of the Raman spectroscopic measurements demonstrated the applicability of this technique for the evaluation of the state of the graphitized carbon black-supported Pt catalysts.

METHOD FOR THE DETERMINATION OF ORGANOPHOSPHORUS PESTICIDE RESIDUES IN OKRA (ABLEMOSCHUS ESCULENTUS) BY LIQUID CHROMATOGRAPHY–TANDEM MASS SPECTROMETRY

A method basing on liquid chromatography–mass spectrometry (LC-MS/MS) was developed for sensitive determination of Organophosphorus pesticides namely Monochrotophos, Quinalphos and Chlorpyrifos in okra in Andhra Pradesh (South India). The method involves extraction of 10 g of homogenized okra samples (2 g of Sodium chloride + 8 g of Magnesium sulfate) with 10 mL of acetonitrile later cleaned up by dispersive solid phase extraction with the combination of primary secondary amine (PSA), graphitized carbon black (GCB), C18, and anhydrous magnesium sulfate. Final analysis was performed by liquid chromatography-electro spray ionization–tandem mass spectrometry operated in the multiple reaction monitoring (MRM) mode, acquiring two specific precursor-production transitions per target compound. The average recoveries measured at 10 µg/kg were in the range 81–106% for all of the compounds tested with relative standard deviations below 14%. The methodology has been proven to be highly efficient and robust and thus the method is highly suitable for monitoring the Maximum Residue Limits (MRL) compliance of the pesticides.

Adsorption Equilibria of Binary Gas Mixtures on Graphitized Carbon Black

Adsorption equilibria for binary gas mixtures (methane-carbon dioxide, methane-ethane, and carbon dioxide-ethane) on the graphitized carbon black STH-2 were measured by the open flow method at 293.2 K. The experimental pressure range was (0 to 1.6) MPa. The extended Langmuir (EL) model and the ideal adsorption solution theory (IAST) have been adopted to predict the equilibria of binary gas mixtures. The results indicate that gas mixtures adsorbed on the homogeneous surface of STH-2 exhibit the nonideal behavior, which is mainly induced by adsorbate-adsorbate interactions. The real adsorption solution theory (RAST) has been used to analyze the property of the adsorbed mixtures. The activity coefficients have been correlated with the Wilson equation. The investigation demonstrates that the nonideality of adsorbed phase is completely dissimilar with the bulk liquid phase. The adsorption of the heavier component would benefit the adsorption of the lighter component.

Comprehensive evaluation of the clean-up step in QuEChERS procedure for the multi-residue determination of pesticides in different vegetable oils using LC-MS/MS

In this study the analytical performance of three QuEChERS-based sample preparation procedures for multi-residue pesticide analysis were evaluated on four different vegetable oil matrices (olive oil, sunflower oil, palm oil and rapeseed oil) by LC-MS/MS. Different combinations of PSA (primary secondary amine), C18 and GCB (graphitized carbon black) sorbents were studied for the selected matrices in an effort to find out the most suitable clean-up approach for the selected types of vegetable oils. The effects of the different level on clean-up were evaluated by monitoring the method performance main parameters (recovery values, matrix effects and limits of detection) for a group of 44 relevant pesticides important in the cultivation of oil plants. From the aspect of matrix effects and LOD studies, the PSA + C18 + GCB sorbent-combination was the most suitable for the analysis of vegetable oils, since this method provided the lowest matrix effects and good LODs. However, when this method was applied, poor recovery was achieved (only 16% of the recovery results were acceptable), as the GCB sorbent adsorbed a remarkable part of the analytes. When GCB was omitted, good recoveries were obtained from all the four vegetable oil matrices tested (91% of results were acceptable) with good reproducibility, indicating that the effectiveness of the clean-up step should be sacrificed to obtain adequate recoveries. The further exclusion of C18 sorbent remarkably decreased the method performance in the case of palm oil and rapeseed oil, indicating that the PSA + C18 combination should be applied, while the applied quantity of GCB sorbent should be carefully adjusted.

Simultaneous Determination of Five Plant Growth Regulators in Fruits by Modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) Extraction and Liquid Chromatography–Tandem Mass Spectrometry

An effective method using liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed and optimized to obtain a complete separation of five representative plant growth regulators (PGRs) [gibberellic acid, 2,4-dichlorophenoxyacetic acid (2,4-D), thidiazuron, forchlorfenuron, and paclobutrazol] in fruits. Extraction was performed with acetonitrile containing 0.1% (v/v) acetic acid, applying modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) methodology. LC-MS/MS conditions including composition of mobile phases and mass spectrometry (MS) conditions were evaluated to achieve the highest sensitivity in MS detection. All of the data acquisition was employed in the segmented multiple-reaction monitoring mode for the selected negative and positive transition ions. The octadecylsilyl (C18) dispersive solid-phase extraction (SPE) sorbent was found to provide the more satisfied recoveries than primary secondary amine (PSA) and graphitized carbon black (GCB) for five target PGRs. The optimized method allowed for recoveries of 76-112% for the five PGRs from fruit samples with relative standard deviation (RSD) values less than 10%. Limits of quantification (0.5-16.5 μg/kg) were lower than the maximum limit of residues established for PGRs. The results demonstrated that the developed LC-MS/MS and QuEChERS extraction method is highly effective for analyzing trace amounts of target PGRs in fruit samples. Finally, the method was successfully used to detect residual PGRs in Beijing, China, in 2010. The concentrations of 2,4-D (5.1-1503 μg/kg) and paclobutrazol (1-1381 μg/kg) found in orange and peach, respectively, suggesting that the use of these PGRs in these fruits should be regulated in China in the future.

Polypyrrole-modified graphitized carbon black as a catalyst support for methanol oxidation

Surface-modified graphitized carbon black (GCB) was produced through carbonization of polypyrrole (Ppy) on the GCB surface to be used as a catalyst support for Pt nanoparticles in electro-oxidation of methanol. The Ppy modification led to the enhancement of the catalytic activity for the Pt catalysts. The improvement is largely attributed to uniform dispersion of the Pt nanoparticles as the Ppy modification appears to reduce the agglomeration of the Pt nanoparticles. The chronoamperometry and the accelerated cycling tests indicated that the Ppy modification did not improve the long-term stability of the GCB support for Pt.

Dispersive Solid-Phase Extraction Cleanup Combined with Accelerated Solvent Extraction for the Determination of Carbamate Pesticide Residues in Radix Glycyrrhizae Samples by UPLC-MS-MS

Dispersive solid-phase extraction (DSPE) cleanup combined with accelerated solvent extraction (ASE) is described here as a new approach for the extraction of carbamate pesticides in Radix Glycyrrhizae samples prior to UPLC-MS-MS. In the DSPE-ASE method, 15 carbamate pesticides were extracted from Radix Glycyrrhizae samples with acetonitrile by the ASE method at 60 °C with a 5 min heating time and two static cycles. Cleanup of a 1 mL aliquot of the extract by the DSPE method used 20 mg PSA (primary secondary amine), 50 mg Al(2)O(3)-N, and 20 mg GCB (graphitized carbon black) (as cleanup sorbents) under the determined optimum conditions. The linearity of the method was in the range of 10 to 200 ng/mL with correlation coefficients (r(2)) of more than 0.996. The limits of detection were approximately 0.2 to 5.0 µg/kg. The method was successfully used for the analysis of target pesticides in Radix Glycyrrhizae samples. The recoveries of the carbamate pesticides at the spiking levels of 50, 100, and 200 µg/kg ranged from 79.7% to 99.3% with relative standard deviations lower than 10%. This multi-residue analytical method allows for a rapid, efficient, sensitive and reliable determination of target pesticides in Radix Glycyrrhizae and other medicinal herbs.

Simultaneous determination of flonicamid and its metabolites in vegetables using QuEChERS and reverse-phase liquid chromatography–tandem mass spectrometry

This paper presents a rapid analytical method for the simultaneous determination of flonicamid and its metabolites N-(4-trifluoromethylnicotinoyl) glycine (TFNG), 4-trifluoromethylnicotinic acid (TFNA), and 4-trifluoromethylnicotinamide (TFNA-AM) in vegetables using QuEChERS by liquid chromatography–tandem mass spectrometry (LC–MS/MS). Samples were extracted with acetonitrile. The extract was purified through QuEChERS method with primary secondary amine (PSA) and graphite carbon black (GCB). Then the extract was diluted with 0.1% formic acid in water, and analyzed by LC–MS/MS on a Waters Acquity BEH C 18 column with methanol/0.1% formic acid in water as mobile phase with gradient elution. The linearity of the analytical response across the studied range of concentrations (0.20–500 μg/L) was excellent, obtaining correlation coefficients higher than 0.998. No significant matrix effects were observed. Recovery studies were carried out on spiked spinach and cucumber blank samples, at four concentration levels (0.01, 0.05, 0.50 and 2.0 mg/kg) performing six replicates at each level. Mean recoveries of 81.3–94.8% with CVs of 2.4–7.0% were obtained. The method demonstrated to be suitable for the simultaneous determination of flonicamid and its metabolites in vegetables.

Rheological and Electrical Properties of Hybrid Nanocomposites of Epoxy Resins Filled with Graphite Nanoplatelets and Carbon Black

Graphite nanoplatelets (GNP) were prepared by microwave irradiation of natural graphites intercalated with ferric chloride in nitromethane (GIC). Intercalated structure of GIC was confirmed by X-ray diffraction patterns. SEM images of GIC after microwave irradiation showed the exfoliation of GIC, the formation of GNPs. Hybrid nanocomposites of bisphenol-A type epoxy resins filled with GNP and a conductive carbon black (CB) were prepared and rheological and electrical properties of the nanocomposites were investigated. Viscosity and electrical surface resistivity of the nanocomposites showed minima at certain mixtures of GNP and CB in the epoxy resins.

Study on Rapid Analysis Method of Pesticide Contamination in Processed Foods by GC-MS and GC-FPD

A simple and rapid method using GC-MS and GC-FPD for the determination of pesticide contamination in processed food has been developed. Pesticides were extracted from a sample with ethyl acetate in the presence of anhydrous sodium sulfate, then cleaned up with a combination of mini-columns, such as macroporous diatomaceous earth, C18, GCB (graphite carbon black) and PSA. Recovery tests of 57 pesticides (known to be toxic or harmful) from ten kinds of processed foods (butter, cheese, corned beef, dried shrimp, frozen Chinese dumplings, grilled eels, instant noodles, kimchi, retort-packed curry and wine) were performed, and the recovery rates were mostly between 70% and 120%. This method can be used to judge whether or not processed foods are contaminated with pesticides at potentially harmful levels.

Screening and Quantification of Pesticides in Water Using a Dual-Function Graphitized Carbon Black Disk

ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionScreening and Quantification of Pesticides in Water Using a Dual-Function Graphitized Carbon Black DiskNahid Amini, Mohammadreza Shariatgorji, Carlo Crescenzi, and Gunnar ThorsénCite this: Anal. Chem. 2011, 83, 2, 631Publication Date (Web):December 22, 2010Publication History Published online22 December 2010Published inissue 15 January 2011https://doi.org/10.1021/ac103105nCopyright © 2010 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views583Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (20 KB) Get e-AlertsSUBJECTS:Analytical chemistry,Drug discovery,Pest control,Pharmaceuticals Get e-Alerts

Modeling of Adsorption of Gases on Graphite Surfaces Accounting for the Solid−Fluid Nonadditivity Correction

A series of graphitized carbon blacks have been studied using argon and nitrogen adsorption at their boiling points. Analysis of adsorption isotherms was performed with nonlocal density functional theory (NLDFT) accounting for the Axilrod-Teller equation to describe the effect of nonadditivity of the gas-solid interaction. In our previous study [Ustinov, E. A. J. Chem. Phys. 2010, 132, 194703] we have shown that the nonadditivity effect decreases the attractive component of Ar-Ar interaction in the first molecular layer adjacent to the graphite surface by about 23%. This is a source of a large error (up to 40%) when a standard NLDFT is applied to fitting the low-temperature Ar adsorption isotherm on a graphitized carbon black. A new approach that incorporates the Axilrod-Teller equation into the standard NLDFT diminishes the relative error from 40 to 4%, which suggests that the nonadditivity correction should not be ignored in most adsorption systems including crystalline and amorphous solids. The present study is an extension of our approach to N(2) adsorption isotherms at 77.3 K on graphitized carbon blacks. We show that the approach allows to reliably determine the gas-solid molecular parameters, the gas-solid nonadditivity coefficient, the Henry coefficient, and the specific surface area. The surface areas of different carbon blacks determined with the N(2) at 77.35 K and Ar at 87.29 K are very close to each other, though in the former case the values proved to be slightly smaller presumably due to nonspherical shape of the nitrogen molecule. A comparison with the Brunauer, Emmett, and Teller method is provided.