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Decoding source of leather odor : a quantitative analysis with heracles NEO / Haonan Shi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 4 (04/2024)
[article]
Titre : Decoding source of leather odor : a quantitative analysis with heracles NEO Type de document : texte imprimé Auteurs : Haonan Shi, Auteur ; Haiming Cheng, Auteur ; Jin Zhou, Auteur Année de publication : 2024 Article en page(s) : p. 165-173 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse quantitative (chimie)
Composés organiques volatils -- Analyse
Cuir
Cuirs et peaux de bovins
Cuirs et peaux de moutons
Odeurs -- Analyse
OlfactométrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather products are widely used in our daily life and in close contact with users, but the pleasant feeling during its usage is severely affected by the odor volatilized from the leather surface. In this study, a quantitative analysis method to investigate the differences in the odor profiles among four types of leather was proposed. The primary olfactory constituents of four leather types were examined by Heracles NEO ultra-fast gas-phase electronic nose, including Principal Component Analysis (PCA) and Discriminant Factor Analysis (DFA). In chrome-tanned cattle hide leather, the substance with the highest content was 2,4-Dinitrotoluene, while methyl dodecanoate was the predominant compound in chromefree cattle hide leather. Notably, chrome-tanned sheepskin leather exhibited higher levels of dodecanal, clopyralid, n-octylbenzene, propyl cinnamate, and 3-methylhexadecane. Similarly, chrome-free sheepskin leather contained higher levels of dodecanal, clopyralid, n-octylbenzene, propyl cinnamate, 3-methylhexadecane, and tetradecanol. These findings indicate that each of the four types of leather possesses distinctive compounds, while also sharing common compounds. Furthermore, the results indicate that radar plots along with PCA and DFA analyses can effectively differentiate between the four types of leather. Note de contenu : - EXPERIMENTAL : Materials and sampling process - Heracles NEO instrumentation and settings - Data analysis and comparison
- RESULTS : Qualitative analysis of volatile compounds by Heracles NEO e-nose - Chemical pattern recognition analysis - PCA principal component analysis - DFA discriminant factor analysis
- Table 1 : The set parameters of Heracles NEO
- Table 2 : Possible volatile compounds identified in CTCL and relative contents
- Table 3 : Possible volatile compounds identified in CFCL and relative contents
- Table 4 : Possible volatile compounds identified in CTSL and relative contents
- Table 5 : Possible volatile compounds identified in CFSL and relative contentsDOI : https://doi.org/10.34314/yv80gx56 En ligne : https://drive.google.com/file/d/1zb1DL6sd8C_ks6W60OR52x0MHQ4lDigX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40824
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIX, N° 4 (04/2024) . - p. 165-173[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24674 - Périodique 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)
[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