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Eco-friendly, rapid and efficient analytical procedure for carcinogenic aryl amines in dyes and consumer products / S. Suresh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 1 (01/2016)
[article]
Titre : Eco-friendly, rapid and efficient analytical procedure for carcinogenic aryl amines in dyes and consumer products Type de document : texte imprimé Auteurs : S. Suresh, Auteur ; R. Ganeshjeevan, Auteur ; N. Priya, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2016 Article en page(s) : p. 17-23 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Arylamine Amine aromatique de formule générale ArNR2, dans laquelle l'atome d'azote est lié directement au noyau aromatique. (Les arylamines ont des propriétés chimiques qui les rapprochent des alkylamines et d'autres qui les rapprochent des arènes. (Elles sont à la base de la synthèse de certains colorants).
Cancérogènes
Chimie analytique
Chromatographie en phase liquide à hautes performances
Colorants -- Analyse
Colorants azoïques
Composés aromatiques
Séparation (technologie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study addressed the analysis of aromatic amines from azo dyes and dyed consumer articles mainly based on leather as they are subjected to screening for release of any of the 24 hazardous aryl amines listed by the European agency. This study involves a reverse phase SPE approach for enriching, and cleaning-up of the matrices to facilitate further analysis by UPLC. The proposed study does away with tertiary butyl ether, other solvents and subsequent evaporation steps thereby cutting down the solvent usage to a major extent (from close to 80ml into 2ml) in sample preparation and the further analysis developed by UPLC, cut short the gradient analysis from 40 min to 6 min enabling additionally the reduction of solvent for mobile phase. Thus the procedure is improvised to serve as Green analytical procedure. The present study offers the scope to complete the sample preparation in 45 min in comparison to 180min by the official procedure (excluding the degreasing step in both these cases). The proposed procedure is simple to adopt with more efficient recovery values in the range 52-104% for all the analytes. The LOD and LOQ of the analysis were 2?g g -1 and 9?g g -1. Note de contenu : - EXPERIMENTAL : Chemicals and reagents - Instrumentation - UPLC condition followed for the aryl amine separation - List of banned aryl amines - release of aryl amine from dyed articles - SPE extraction of aryl amines. This step is the beginning of the new approach
- RESULTS AND DISCUSSION : Evaluation of different SPE materials for recovery of aryl amines - Breakthrough studies for aryl amines for SPE by ENVI-18 - Capacity of ENVI-18 SPE for aryl amines - Validation of method - Analysis of real samplesEn ligne : https://drive.google.com/file/d/10-5VA4PsLlotcrf9jv3wiPdmjpDwZTSR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25274
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 1 (01/2016) . - p. 17-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17767 - Périodique Bibliothèque principale Documentaires Disponible Effect of inorganic anions on the photocatalytic decolorisation of an azo dye in the aqueous phase by cadmium sulphide/polymer nanocomposite films under visible light irradiation / Ru Jiang in COLORATION TECHNOLOGY, Vol. 127, N° 6 (2011)
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Titre : Effect of inorganic anions on the photocatalytic decolorisation of an azo dye in the aqueous phase by cadmium sulphide/polymer nanocomposite films under visible light irradiation Type de document : texte imprimé Auteurs : Ru Jiang, Auteur ; Yujiang Guan, Auteur ; Huayue Zhu, Auteur ; Yongqian Fu, Auteur Année de publication : 2011 Article en page(s) : p. 426-433 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anions
ChitosaneLe chitosane ou chitosan est un polyoside composé de la distribution aléatoire de D-glucosamine liée en ß-(1-4) (unité désacétylée) et de N-acétyl-D-glucosamine (unité acétylée). Il est produit par désacétylation chimique (en milieu alcalin) ou enzymatique de la chitine, le composant de l'exosquelette des arthropodes (crustacés) ou de l'endosquelette des céphalopodes (calmars...) ou encore de la paroi des champignons. Cette matière première est déminéralisée par traitement à l'acide chlorhydrique, puis déprotéinée en présence de soude ou de potasse et enfin décolorée grâce à un agent oxydant. Le degré d'acétylation (DA) est le pourcentage d'unités acétylées par rapport au nombre d'unités totales, il peut être déterminé par spectroscopie infrarouge à transformée de Fourier (IR-TF) ou par un titrage par une base forte. La frontière entre chitosane et chitine correspond à un DA de 50 % : en deçà le composé est nommé chitosane, au-delà , chitine. Le chitosane est soluble en milieu acide contrairement à la chitine qui est insoluble. Il est important de faire la distinction entre le degré d'acétylation (DA) et le degré de déacétylation (DD). L'un étant l'inverse de l'autre c'est-à -dire que du chitosane ayant un DD de 85 %, possède 15 % de groupements acétyles et 85 % de groupements amines sur ses chaînes.
Le chitosane est biodégradable et biocompatible (notamment hémocompatible). Il est également bactériostatique et fongistatique.
Le chitosane est également utilisé pour le traitement des eaux usées par filtration ainsi que dans divers domaines comme la cosmétique, la diététique et la médecine.
Colorants azoïques
Décoloration
Irradiation
Matériaux hybrides
Orange méthylique
Photocatalyse
Sulfure de cadmiumIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Batch experiments were carried out to study the effects of various inorganic anions on the photocatalytic decolorisation of an azo dye (CI Methyl Orange 13025) in the aqueous phase in the presence of cadmium sulphide/polymer nanocomposite films under visible light irradiation. When anion concentrations were low (0.001 m), the inhibition effect on the photocatalytic decolorisation of CI Methyl Orange 13025 caused by these anions was ranked as inline image. The presence of both inline image and inline image baffled the breakage of the benzene ring in the chemical structure of CI Methyl Orange 13025, while the presence of inline image was of benefit to the degradation of the benzene ring. Adsorption experiments indicated that inorganic anions affected the decolorisation of CI Methyl Orange 13025 by competitive adsorption onto the surface of the photocatalyst. The photocatalytic decolorisation of CI Methyl Orange 13025 followed the pseudo-first-order kinetic reaction model well in all experimental cases. Note de contenu : - EXPERIMENTAL : Reagents and chemicals - Preparation and characterisation of cadmium sulphide/polymer (chitosan) nanocomposite films - Photocatalytic decolorisation of CI methyl orange 13025
- RESULTS AND DISCUSSION : Characterisation of cadmium sulphide/polymer nanocomposite films - Effect of different anions on the photocatalytic decolorisation of CI methyl orange 13025 - Effect of sulphate anions - Effect of phosphate anions - Effect of carbonate anions - Effect of nitrate anions - Comparison of the effect of different anions - Comparison of UV-vis spectraDOI : 10.1111/j.1478-4408.2011.00341.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12664
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Code-barres Cote Support Localisation Section Disponibilité 13476 - Périodique Bibliothèque principale Documentaires Disponible Effect of tartrazine dye on micellisation of cationic surfactants : conductometric, spectrophotometric, and tensiometric studies / Anwar Ali in COLORATION TECHNOLOGY, Vol. 132, N° 5 (10/2016)
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Titre : Effect of tartrazine dye on micellisation of cationic surfactants : conductometric, spectrophotometric, and tensiometric studies Type de document : texte imprimé Auteurs : Anwar Ali, Auteur ; Sahar Uzair, Auteur ; Ummer Farooq, Auteur ; Maroof Ali, Auteur Année de publication : 2016 Article en page(s) : p. 375-386 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Analyse
Colorants azoïques
Micelles
Surfactants
TartrazineIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The interactions between anionic dye (tartrazine) and cationic surfactants (dodecyltrimethylammonium bromide and cetyltrimethylammonium bromide) have been studied by conductometric, spectrophotometric, and tensiometric techniques. The conductance and surface tension of dodecyltrimethylammonium bromide and cetyltrimethylammonium bromide in pure water as well as in aqueous tartrazine when plotted with surfactant concentration gave values of the critical micelle concentration at different temperatures. As well as increasing the length of the carbon chain of surfactants, the presence of tartrazine reduces the critical micelle concentration. From specific conductivity data, the counterion dissociation constant, standard free energy, enthalpy, entropy of micellisation, surface excess concentration, surface tension at critical micelle concentration, minimum area per molecule, surface pressure at critical micelle concentration, and Gibbs energy of adsorption were evaluated. Spectroscopic studies reveal that the binding of dye to micelles brings a bathochromic shift in dye absorption spectra that indicates dye–surfactant interaction. Note de contenu : - Conductometric study
- UV-vis spectroscopic study
- Tensiometric studyDOI : 10.1111/cote.12229 En ligne : https://drive.google.com/file/d/1uDW683WCkahiB9wIa-3DK_1CSXrb--hO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27226
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Code-barres Cote Support Localisation Section Disponibilité 18353 - Périodique Bibliothèque principale Documentaires Disponible Experimental and theoretical insight into the electronic properties of 4-aryl-5-arylazo-3-cyano-6-hydroxy-2-pyridone dyes / Vesna D. Vitnik in COLORATION TECHNOLOGY, Vol. 133, N° 3 (06/2017)
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Titre : Experimental and theoretical insight into the electronic properties of 4-aryl-5-arylazo-3-cyano-6-hydroxy-2-pyridone dyes Type de document : texte imprimé Auteurs : Vesna D. Vitnik, Auteur ; Željko J. Vitnik, Auteur ; Bojan D. Bozic, Auteur ; Natasa V. Valentic, Auteur ; Sanda P. Dilber, Auteur ; Dusan Z. Mijin, Auteur ; Gordana S. Uscumlic, Auteur Année de publication : 2017 Article en page(s) : p. 223-233 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Analyse
Colorants -- Propriétés électroniques
Colorants azoïquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this paper, spectroscopic and quantum mechanical investigation of nine 4-aryl-5-arylazo-3-cyano-6-hydroxy-2-pyridone dyes was performed, and obtained density functional theory (DFT) results were compared with experimental data. The structural and spectroscopic properties of azo-2-pyridone dyes were studied by DFT using B3LYP, CAM-B3LYP, and M06-2X methods with a 6-311++G(d,p) basis set. Comparison of results reveals that the scaled theoretical vibrational frequencies of azo dyes are in good agreement with experimental data. The time-dependent DFT calculated and experimental ultraviolet-visible (UV-vis) absorption spectra are also in good agreement. The effect of electron-donating –OCH3 and electron-withdrawing –NO2 groups on the structural parameters, vibrational frequencies, UV-vis absorption, and natural bond orbital (NBO) atomic charges were thoroughly analysed. Vibrational, UV-vis, and NBO analyses confirm that investigated dyes exist in the hydrazo tautomeric form in the solid state and ethanol solution. These analyses signify the occurrence of intramolecular charge transfer in these azo-pyridone dyes. Note de contenu : - EXPERIMENTAL : General - Method of calculation
- RESULTS AND DISCUSSION : Molecular geometry - Vibrational analysis - UV-vis studies and electronic properties - Frontier molecular orbital analysis - Atomic charge analysisDOI : 10.1111/cote.12271 En ligne : https://drive.google.com/file/d/1275lRats7V8B1xb9y6tmzWVCBeaDewqv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28647
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Code-barres Cote Support Localisation Section Disponibilité 18922 - Périodique Bibliothèque principale Documentaires Disponible Experimental study on supercritical water oxidation of CI Reactive Orange 7 dye wastewater using response surface methodology / Jie Zhang in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)
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Titre : Experimental study on supercritical water oxidation of CI Reactive Orange 7 dye wastewater using response surface methodology Type de document : texte imprimé Auteurs : Jie Zhang, Auteur ; Shuzhong Wang, Auteur ; Yang Guo, Auteur ; Donghai Xu, Auteur ; Yanmeng Gong, Auteur ; Xingying Tang, Auteur Année de publication : 2012 Article en page(s) : p. 323-330 Note générale : Errata (voir URL) - Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Détérioration
Colorants -- Oxydation
Colorants azoïques
Eaux usées -- Epuration
Fluides supercritiques
Surfaces de réponse (statistique)Index. décimale : 667.3 Teinture et impression des tissus Résumé : Supercritical water oxidation of azo dye CI Reactive Orange 7 solution was investigated in a batch reactor. Response surface methodology was employed for the experimental design. Quadratic polynomial equations were established based on the results of the experiments. Optimisation of the process was then conducted in accordance with the simulated equations. The results show that removal of chemical oxygen demand, total organic carbon and total nitrogen can be achieved up to 99, 95 and 69%, respectively, and the predictive data were in reasonable agreement with the experimental results. It seems that response surface methodology is useful and feasible for the optimisation of CI Reactive Orange 7 dye wastewater supercritical water oxidation processing. The gas chromatography/mass spectrometry analysis results show that a large amount of 2,4-pentadienenitrile with diazo formed during the CI Reactive Orange 7 supercritical water oxidation reaction, which suggested that the azo firstly reacted to the diazo, and then converted into the final product of nitrogen. Note de contenu : - EXPERIMENTAL : Experimental apparatus and procedure - Materials and analytical methods - Calculation methods - Experimental design
- RESULTS AND DISCUSSION : Model establishment for supercritical water oxidation of CI Reactive Orange 7 dye wastewater - Optimisation for supercritical water oxidation treatment of CI Reactive Orange 7 dye wastewaterDOI : 10.1111/j.1478-4408.2012.00384.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00384.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15682
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Code-barres Cote Support Localisation Section Disponibilité 14081 - Périodique Bibliothèque principale Documentaires Disponible A facile synthesis and tautomeric structure of novel 4-arylhydrazono-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones and their application as disperse dyes in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)
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PermalinkMicrowave 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)
PermalinkNew disazo dyes derived from aminopyrazoles : synthesis, spectroscopic properties, computational study and structural properties / Fati Yildirim in COLORATION TECHNOLOGY, Vol. 137, N° 4 (12/07/2021)
PermalinkNew insights into dye chemistry and physics / Stephen N. Batchelor in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)
PermalinkNew trends in leather dyestueffs development and classification / H. Wicki in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
PermalinkNew trends in leather dyestuffs development and classification / H. Wicki in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 5 (09-10/1976)
PermalinkA new yellow azo pigment / Bernhard Stengel-Rutkowski in EUROPEAN COATINGS JOURNAL (ECJ), N° 03/01 (03/2001)
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PermalinkPhotoassisted degradation of CI reactive red 195 using and Fe(III)-grafted polytetrafluoroethylene fibre complex as a novel heterogeneous Fenton catalyst over a wide pH range / Bing Li in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)
PermalinkPrediction of the photofading of 1-H or 1-ethyl derivatives of 3-cyano-6-hydroxy-4-methyl-5-(p-X-phenylazo)-2-pyridone dyes and their azo-hydrazone tautomerism: A theoretical study / Krzysztof Wojciechowski in COLORATION TECHNOLOGY, Vol. 139, N° 3 (06/2023)
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