Determination of soluble hexavalent chromium in dyed consumer goods improvised by a simple on-line color removal / R. Ganeshjeevan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 7 (07/2015)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 7 (07/2015) . - p. 204-210 Titre : Determination of soluble hexavalent chromium in dyed consumer goods improvised by a simple on-line color removal Type de document : texte imprimé Auteurs : R. Ganeshjeevan, Auteur ; S. Suresh, Auteur ; Chellappa Muralidharan, Auteur ; S. Raja, Auteur ; Asit Baran Mandal, Auteur Année de publication : 2015 Article en page(s) : p. 204-210 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuir -- Teneur en chrome hexavalent Cuirs et peaux -- Analyse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hexavalent chromium detection in consumer articles is a statutory requirement and screening it in dyes and dyed leather is a challenge. Although many new improvised procedures were put forward, the lack of simplicity and automation leaves the void. The present study addresses these issues and offers a procedure that is closer to automated approach leading to finding that without the requirement of any special device the regular liquid chromatographic instrument can support a quick, simple and efficient method for hexavalent chromium detection in strongly colored leathers. The method was found to be effective in the removal of wide range of dyes and serving the detection of hexavalent chromium in ppb levels with %RSD of max. 3.5. Note de contenu : - EXPERIMENTAL : Instrumentation - Chemicals and reagents - Standards preparation - Ion chromatographic conditions - Preparation of post-column reagent - Preparation of guard column - Preparation of buffer for sample extraction - Preparation of samples - Procedure for analyzing samples - RESULTS AND DISCUSSION : Different grades of florisil and their impact on chrome speciation and dye removal - The efficiency of color removal by florisil - Tolerance level of dyes for florisil guard - Recovery of hexavalent chromium - Choice of flow rate of mobile phase - Validation of method - Analysis of real samples En ligne : https://drive.google.com/file/d/1OCOyV1lLYRy4dibcAmwiNza9i-t3Z3pD/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24370 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17327	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 1 (01/2016) . - p. 17-23 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 samples En ligne : https://drive.google.com/file/d/10-5VA4PsLlotcrf9jv3wiPdmjpDwZTSR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25274 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17767	-	Périodique	Bibliothèque principale	Documentaires	Disponible

A fast and robust analytical method based on QuEChERS technique using UPLC- PDS for quantification of carcinogenic arylamines in consumer goods inclusive of leather / S. Suresh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 4 (04/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 4 (04/2023) . - p. 139-149 Titre : A fast and robust analytical method based on QuEChERS technique using UPLC- PDS for quantification of carcinogenic arylamines in consumer goods inclusive of leather Type de document : texte imprimé Auteurs : S. Suresh, Auteur ; N. Priya, Auteur ; R. Kunjitham, Auteur ; Kalarical Janardhanan Sreeram, Auteur Année de publication : 2023 Article en page(s) : p. 139-149 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse quantitative (chimie) Arylamines Cancérogènes Chromatographie en phase liquide à hautes performances Colorants -- Analyse Cuirs et peaux -- Analyse Extraction (chimie) Textiles et tissus -- Analyse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Arylamines present in leather and textile products are reduced in vivo by cleavage of azo groups to form highly mutagenic and carcinogenic products that pose consumer’s health risk. The major textile and leather products that are offered to consumers need to be safe. In order to ensure safety as per the global regulations, the allowed limit of carcinogenic amines in textile and leather products cannot be more than 20 mg/kg. There are several methods that have been used for extracting the azo dyes and analyzing them in textile and leather products. Most of these methods are polluting from high solvent usage, time consuming, laborious, and have lower recovery rates. In the present study QuEChERS method, (dispersive solid phase extraction-dSPE) method was utilized for extraction of carcinogenic arylamines from dyed leather and textile products. The released arylamines are extracted into acetonitrile using QuEChERS salt and analyzed by Ultra Performance Liquid Chromatography-Photo Diode Array (UPLC-PDA). The extracted product was further confirmed by Gas Chromatography-Mass Spectrometer (GC-MS). The method proposed in this study is novel as it eliminates all significant concerns associated with the official ISO-17234-1 &14362-1 test methods, such as use of solvents like tert-butyl methyl ether (MTBE) and the long duration of analysis. The sample preparation time is minimized from 120 min to 20 min. The developed method is easy to adopt with efficient recovery rate of arylamines in comparison to the official ISO method. Note de contenu : - EXPERIMENTAL : Chemicals and reagents - Instrumentation - List of banned arylamines - Preparation of reference standard for analysis - The official procedure, ISO 17234-1 for extractio of arylamines - CHROMATOGRAPHIC CONDITION : UPLC-PDA condition followed for the arylamine separation - GC-MS condition followed for the arylamine confirmation - Samples preparation of the proposed QuEChERs method - RESULTS AND DICUSSION : In-situ reduction - QuEChERS for analysis of arylamines - Effect of H on recovery of arylamines - Optimization of centrifugal speed for extraction and recovery of arylamines - Optimization of centrifugal time for extraction and recovery of arylamines - Validation of the method - Analysis of real samples - Table 1 : The list of specific mass ions (SIM) of arylamines for GCMS analysis - Table 2 : Method validation data for proposed method - Table 3 : Real sample analysis data for leather, textile and dyes by the proposed method with RSD DOI : https://doi.org/10.34314/jalca.v118i4.7204 En ligne : https://drive.google.com/file/d/1-6p88akO6WMa2iipsyWDEvg1jPu4_YYn/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39182 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24030	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 3 / 3)