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Determination of short polychlorinated alkanes in leather using gas chromatography-electron capture negative chemical ionization mass spectrometry / A. Rey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 10 (10/2011)
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[article]
Titre : Determination of short polychlorinated alkanes in leather using gas chromatography-electron capture negative chemical ionization mass spectrometry Type de document : texte imprimé Auteurs : A. Rey, Auteur ; N. Blanc, Auteur ; A. Berthod, Auteur Année de publication : 2011 Article en page(s) : p. 294-302 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chromatographie en phase gazeuse
Extraction (chimie)
Filtration
Hexane
Polychloro alcanes
Spectrométrie de masse à ionisation chimique
UltrasonsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Polychlorinated alkanes (PCA) are organic compounds of general formula C2H(2x+2-y)Cly. PCA are extremely complex industrial mixtures of randomly chlorinated petroleum distillate. They are made of several thousands structural isomers. The short chain isomers (sPCA) have a carbon number between 10 and 13. All PCAs have a high environmental persistence and accumulate in the biosphere. They were included in all regulatory programs implying reliable methods for their determination in various samples. The content of sPCA is regulated in leather. The objective of this study was to develop a reliable and sensitive analytical method to determine and to quantify sPCA in real-world leather samples. The protocol started by an ultrasound-assisted hexane extraction of the ground leather sample. The extract was purified by filtration on a Florisil® (magnesium silicate) column with hexane/dichloromethane 9/1 v/v eluant. The concentrated extract was redissolved in 5 mL isooctane for analysis with a gas chromatograph coupled with a mass spectrometer in the electron capture negative ionization mode. The method was validated and used with real-world samples giving a reliable limit of quantification of 2 mg/kg +/- 0.2 mg/kg for the sPCA family. Note de contenu : EXPERIMENTAL : Chemicals - Sampling - Extraction, clean-up - Chromatographic equipment
POLYCHRLORINATED ALKANES PROPERTIES : Production - Phsycochemical properties and composition - Hydrophobicity - Uses
RESULTS AND DISCUSSION : Optimisation of extraction and clean-up procedure - PCA quantification - Real samplesEn ligne : https://drive.google.com/file/d/11wpKcdYWzj1qhJ25GJHUCs4BEN3BNsmA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12215
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 10 (10/2011) . - p. 294-302[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13365 - Périodique Bibliothèque principale Documentaires Disponible Détermination de la teneur en composés organiques volatils (COV) / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2002)
Titre : Détermination de la teneur en composés organiques volatils (COV) : Partie 2 - méthode par chromatographie en phase gazeuse - Norme NF EN ISO 11890-2 Type de document : texte imprimé Auteurs : International Organization for Standardization (Genève, Suisse) , Auteur
Editeur : Geneve [Switzerland] : International Organization for Standardization (ISO) Année de publication : 2002 Autre Editeur : Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) Importance : 14 p. Présentation : ill. Format : 30 cm Note générale : Annexes Langues : Français (fre) Catégories : Analyse quantitative (chimie)
Chromatographie en phase gazeuse
Echantillonnage
Revêtements -- Analyse
Revêtements -- Normes:Peinture -- Normes
Revêtements -- Teneur en composés organiques volatils:Peinture -- Teneur en composés organiques volatils
Revêtements organiques
Vernis -- Analyse
Vernis -- Normes
Vernis -- Teneur en composés organiques volatilsIndex. décimale : 667.9 Revêtements et enduits Résumé : Le présent document fait partie d'une série de normes qui traitent de l'échantillonnage et des essais relatifs aux peintures, vernis et produits assimilés. Il décrit une méthode pour déterminer la teneur en composés organiques volatils (COV) des peintures, vernis. Il doit être utilisé lorsque la teneur escomptée en composés organiques volatils est supérieure à 0,1 % en masse et inférieure à environ 15 % en masse.
La méthode est effectuée par chromatographie en phase gazeuse.Indice de classement : T 30-407-2 Classification ICS : 87.040 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7669 Réservation
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Code-barres Cote Support Localisation Section Disponibilité N000114 T 30-407-2 Norme Bibliothèque principale Documentaires Disponible Development of a headspace-solid phase micro extraction method for the analysis of volatile and semi-volatile organic compounds from polyurethane resins for leather finishing / Antonia Flores in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 8 (08/2021)
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[article]
Titre : Development of a headspace-solid phase micro extraction method for the analysis of volatile and semi-volatile organic compounds from polyurethane resins for leather finishing Type de document : texte imprimé Auteurs : Antonia Flores, Auteur ; Silvia Sorolla, Auteur ; Concepcio Casas, Auteur ; Rosa M. Cuadros, Auteur ; Anna Bacardit, Auteur Année de publication : 2021 Article en page(s) : p. 290-297 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse quantitative (chimie)
Chromatographie en phase gazeuse
Composés organiques volatils -- Analyse
Cuirs et peaux -- Finition
Extraction (chimie)
Polyuréthanes
Spectrométrie de masseIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Volatile organic compounds (VOCs) and Semi-Volatile Organic Compounds (SVOCs) arise from the chemicals used in the various stages of the leather manufacturing process. An important aim of the tanning industry is to minimize or eliminate VOCs and SVOCs, without lowering the quality of leather.
This paper shows the development of a new headspace-solid phase micro extraction coupled with gas chromatography–mass spectrometry (HS-SPME/GC-MS) method for the identification of VOCs and SVOCs emitted by newly designed polymers for the leather finishing operation. These new polymers are polyurethane resins designed to reduce the VOC and SVOC concentration. This method enables a simple and fast determination of the qualitative and semi-quantitative content of VOCs and SVOCs in polyurethane-type finishing resins. The chemicals that are of concern in this paper are the following: Dipropylene glycol Monomethyl Ether (DPGME), DBE-3 (a mixture of dibasic esters) and Triethylamine (TEA). The test conditions that have been determined to carry out the HS-SPME assay are the following: incubation time (2 hours), extraction temperature and time (40°C; 5 minutes) and the desorption conditions (280°C, 50 seconds).
Ten samples of laboratory scale resins were tested by HS-SPME followed by gas chromatography (GC-MS). DPGME and DBE-3 (a mixture of dimethyl adipate, dimethyl glutarate and dimethyl succinate) have been identified effectively. The compounds are identified by a quantitative method using external calibration curves for the target compounds. The technique is not effective to determine the TEA compound, since the chromatograms shown poor resolution peaks for the standard.Note de contenu : - EXPERIMENTAL : Chemicals and reagents - Chromatography - HS-SPME method
- OPTIMIZING THE HS-SPME/GC-MS TEST CONDITIONS : SPME fiber - Sample stirring - Sample preparation - Time exposure - Extraction conditions - Desorption and fiber reconditioning
- RESULTS : HS-SPME/GC-MS optimized method for VOV and SVOC determination - Analytical calibration and quantification
- Table 1 : Relation between the incubation time and eluted area for DPGME isomers
- Table 2 : Extraction time and eluted area for DPGME isomers
- Table 3 : Extraction temperature and eluted area for DPGME isomers
- Table 4 : Desorption temperature and eluted area for DPGME isomers
- Table 5 : Desorption time and eluted area for DPGME isomers
- Table 6 : Optimised conditions for the HS-SPME assay of polyurethane resins
- Table 7 : Identification of VOC compounds from NV004 by HS-SPME/GC-MS
- Table 8 : Calibration curves by external standard from the four target compounds
- Table 9 : Concentration of the target compounds in the resin samples by HS-SPME/GC-MSDOI : https://doi.org/10.34314/jalca.v116i8.4362 En ligne : https://drive.google.com/file/d/19a2FgbbF0GGCcFeDZvxeHmaljBNBVe1f/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36086
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 8 (08/2021) . - p. 290-297[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22875 - Périodique Bibliothèque principale Documentaires Disponible Development of methods for the determination of bisphenol a in food simulants / R. J. Wingender in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 877 (02/1998)
[article]
Titre : Development of methods for the determination of bisphenol a in food simulants Type de document : texte imprimé Auteurs : R. J. Wingender, Auteur ; Paul Niketas, Auteur ; Christopher K. Switala, Auteur Année de publication : 1998 Article en page(s) : p. 75-82 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aliments -- Emballages -- Aspect sanitaire
Chromatographie en phase gazeuse
Chromatographie en phase liquide à hautes performances
Contamination chimique
Emballages métalliques
Epoxydes
Matériaux pour les industries agro-alimentaires
Spectrométrie de masse
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy resins based on bisphenol A (BPA) have been used as components of food and beverage can coatings for more than 50 years. The recent interest in analysis of extractable BPA from these resins has made it necessary to develop validated methods with performance characteristics necessary for successful analyses in regulatory food simulants. The present study was conducted to develop analytical methodology so that suitably equipped laboratories could confidently perform these analyses. Two methods were developed and validated through round robin sampling. A historical treatment of the method development challenges, round robin studies, and results are described here. Note de contenu : - EXPERIMENTAL : Can processing - Final HPLC method - Final GC/MS method - Silylation with TMCS - Silylation with BSTFA - Analysis
- RESULTS AND DISCUSSION : Round-robin No. 1 - Round-robin No. 2 - Round-robin No. 3Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17962
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 877 (02/1998) . - p. 75-82[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003546 - Périodique Bibliothèque principale Documentaires Disponible Direct VOC analysis of water-based coatings by gas chromatography and solid-phase microextraction / Albert C. Censullo in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 69, N° 869 (06/1997)
[article]
Titre : Direct VOC analysis of water-based coatings by gas chromatography and solid-phase microextraction Type de document : texte imprimé Auteurs : Albert C. Censullo, Auteur ; Dane R. Jones, Auteur ; Max T. Wills, Auteur Année de publication : 1997 Article en page(s) : p. 33-41 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie analytique
Chromatographie en phase gazeuse
Composés organiques volatils
Extraction (chimie)
Revêtements en phase aqueuse:Peinture en phase aqueuse
solvantsIndex. décimale : 667.9 Revêtements et enduits Résumé : Solvents in water-based coatings may be determined by sampling the coating head space using solid phase microextraction and gas chromatographing the extract. Several water-based coatings of known composition were analyzed by direct capillary gas chromatography and excellent agreement with theoretical VOC values was obtained. Fifty-two water-based architectural and industrial maintenance coatings were analyzed by a combination of SPME/GC and direct GC of solutions in methanol or dimethyl-formamide and the results compared with reported values. The SPME/GC method appears to be especially suitable for the analysis of low VOC content water-based coatings, for which EPA Method 24 often gives poor results. The identification and quantitation ofexempt solvents may be performed easily with this method. Residual solvent in dried paint films may be determined by SPME/GC. Note de contenu : - EXPERIMENTAL : Solid-phase microextraction - Direct analysis of coatings samples - Validation - Paint film analysis - Gas chromatographic analysis of commercial water-based coatings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18244
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 69, N° 869 (06/1997) . - p. 33-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003538 - Périodique Bibliothèque principale Documentaires Disponible PermalinkPermalinkFormaldehyde in leather : causes and avoidance / G. Wolf in WORLD LEATHER, Vol. 15, N° 1 (02-03/2002)
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PermalinkGas chromatography as a tool for quality control in production of bovine tallow olein / Guilherme P. S. Priebe in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 4 (04/2012)
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PermalinkGas chromatography of coating materials / J. K. Haken / New York [United States] : Marcel Dekker, Inc. (1974)
PermalinkA gas-sensor-based measurement setup for inline quality and process control in polymer extrusion / Michael Aigner in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 4 (08/2014)
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PermalinkIdentification et mécanismes réactionnels / L. Plessier in CAOUTCHOUCS & PLASTIQUES, N° 786 (05/2000)
PermalinkIdentifying VOC in powder coatings / Thierry Randoux in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/95 (11/1995)
PermalinkImproved method for accurate and efficient analysis of chlorophenols in leather compared with conventional steam distillation operation specified by ISO 17070-2015 / Ze-Sheng Wang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 8 (08/2022)
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PermalinkLes innombrables applications de la chromatographie bidimensionnelle en phase gazeuse / Raphaël L. Pepino in L'ACTUALITE CHIMIQUE, N° 459 (02/2021)
PermalinkPermalinkInvestigating the influence of excipient batch variation on the structure, consistency and physical stability of polysorbate 60–based topical vehicles / Hoang Vu Dang in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 6 (12/2021)
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PermalinkPermalinkIsoline concepts to find measurement geometries for effect coatings full gonio colour characterisation / Michael Rösler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4581 (02/2013)
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PermalinkLiants pour peintures et vernis. Colophane - Analyse par chromatographie en phase gazeuse - Norme internationale ISO 19334 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2010)
PermalinkPermalinkMicrowave and ultrasound assisted reduction of a benzidine based bis azo dyed leather / Farman Ahmed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 6 (11-12/2020)
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PermalinkPermalinkPeintures et vernis. Détermination de la teneur en composés organiques volatiles dans les peintures émulsions à faible teneur en COV (COV en emballage) - Norme NF en ISO 17895 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (2006)
PermalinkPenetration studies of active model substances from an O/W emulsion - Influence of the lipophilicity of the formulation in human skin in IFSCC MAGAZINE, Vol. 15, N° 3 (07-08-09/2012)
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