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On-line determination of formaldehyde in tannery effluent by reverse reference flow injection analysis with phenol reagent / Li Nan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 5 (09-10/2013)
[article]
Titre : On-line determination of formaldehyde in tannery effluent by reverse reference flow injection analysis with phenol reagent Type de document : texte imprimé Auteurs : Li Nan, Auteur ; Zhang Xinshen, Auteur ; Chen Shujuan, Auteur ; Ma Yujie, Auteur ; Jin Haochen, Auteur ; Li Hui, Auteur Année de publication : 2013 Article en page(s) : p. 207-210 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse par injection en flux continu L’analyse par injection en flux continu (Flow Injection Analysis FIA) consiste, dans son principe le plus simple, en l’injection d’un petit volume (µL) d’une solution échantillon dans un fluide en mouvement ; ce liquide transporteur, qui se déplace de façon continue, n’est pas segmenté, et la zone formée par l’injection répétée de l’échantillon est ainsi transportée vers un détecteur afin d’enregistrer les variations d’un paramètre physique ou physico-chimique caractéristique de l’échantillon ou, le plus souvent, de l’un de ses éléments constitutifs.
Chimie -- Essais et réactifs
Eaux usées -- Analyse
Eaux usées -- Teneur en formaldéhyde
Phénol
SpectrophotométrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A novel reverse reference flow injection analysis (rrFIA) method coupled with spectrophotometric detection is described for the determination of formaldehyde in tannery effluent. The absorbance of the complex is measured at 630nm. Chemical factors and rrFIA variables affecting the system are also discussed. Under the optimal conditions, the linear range of this method is 0.005-1.0mg•L-1; the detection limit is 4.01pg•L-1; the precision is 0.583%. Comparing the method with the National Standard Method of China, the error is within ± 5% which meets the requirements. The proposed method is simple and convenient for the determination of formaldehyde in tannery effluent. Note de contenu : - EXPERIMENTAL PROCEDURE : Reagents - Apparatus - Analytical procedure
- RESULTS AND DISCUSSION : Detection wavelength - Effect of chemical reaction variables - Effect of flow injection variables - Effect of sampling volume - Calibration curve, reproducibility and detection limit - Effect of foreign matterEn ligne : https://drive.google.com/file/d/1fRwiYnmxn76M9-ia9gUIhWLltPuSKuik/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19569
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 5 (09-10/2013) . - p. 207-210[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15601 - Périodique Bibliothèque principale Documentaires Disponible On-line determination of nitrite in tannery effluent by flow injection analysis / Li Hui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)
[article]
Titre : On-line determination of nitrite in tannery effluent by flow injection analysis Type de document : texte imprimé Auteurs : Li Hui, Auteur ; Zhang Xinshen, Auteur ; Yu Lingyun, Auteur ; Chen Shujuan, Auteur Année de publication : 2012 Article en page(s) : p. 195-199 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Analyse
Eaux usées -- Teneur en nitrites
Spectrophotométrie
TannageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to control the pollution by nitrite, a direct spectrophotometric flow injection method for the determination of nitrite in tannery effluents has been developed. The method is based on the diazotized intramolecular coupling of a 4-amino-5hydroxynaphthalene-2,7-disulfonic acid monosodium salt hydrate (AHNDMS) by the addition of nitrite in a phosphate buffer solution of pH7.5 and the increase in absorbance of the purple complex is monitored at 550nm. Chemical factors and FIA variables affecting the system are also discussed. Under the optimal conditions, the linear range of this method was 20-1500µg l-1 ; the detection limit was 0.15µg l-1 ; the relative standard deviation was 0.67 % (n=11, 450µg l-1). This method was suitable for automatic and continuous analysis, and successfully applied to determine the content of nitrite in tannery effluent. Note de contenu : - EXPERIMENTAL PROCEDURE : Apparatus - Reagents - Procedure
- RESULTS AND DISCUSSION : Detection wavelength - Optimization of flow injection variables - Effect of chemical reaction variables - Analytical figures of meritEn ligne : https://drive.google.com/file/d/14r-HRCBvrd6xQJ2BYkjkdATkz2GBFyi-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16200
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 5 (09-10/2012) . - p. 195-199[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14228 - Périodique Bibliothèque principale Documentaires Disponible Preparation of antibacterial sheepskin with silver nanoparticles : potential for use as a mattress for pressure ulcer prevention / Weite Yang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 3 (03/2012)
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Titre : Preparation of antibacterial sheepskin with silver nanoparticles : potential for use as a mattress for pressure ulcer prevention Type de document : texte imprimé Auteurs : Weite Yang, Auteur ; Xuan Wang, Auteur ; Ying Gong, Auteur ; Li Hui, Auteur ; Wuyong Chen, Auteur ; Carmen Gaidau, Auteur Année de publication : 2012 Article en page(s) : p. 85-91 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Argent
Cuirs et peaux -- Emploi en thérapeutique
Cuirs et peaux de moutons
Nanoparticules
Peau -- Ulcères -- PréventionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the study, sheepskin was treated with silver nanoparticles, which were prepared at the concentration of 2.4×10-2 g·L-1 with average particles size about 26 nm. And then, the adsorption of the silver nanoparticles by the sheepskin, as well as the morphology and the antibacterial effect of the treated sheepskin were investigated. The UV-vis absorption spectroscopy indicated nearly all of the silver nanoparticles were adsorbed by the sheepskin with this method. From scanning electron microscopy (SEM) observations, it was confirmed that the nanoparticles attached on the surface of the sheepskin. The antibacterial effect of the treated sheepskin was evaluated after repeated perspiration treatments. The results of antibacterial study showed that the treated sheepskin had an antibacterial inhibition of 99.9% against Escherichia coli and Staphylococcus aureus, even after 6 cycles of perspiration treatment, the sheepskin still exhibited a durable antibacterial effect with the inhibition rate above 79.4% and 67.1% respective to the leather and the wool. Thus, this study has provided an eco-friendly alternative for the preparation of antibacterial sheepskin without organic compounds, which would be potentially used as a mattress for pressure ulcer prevention. Note de contenu : - EXPERIMENTAL : Materials - Preparation of silver nanoparticles - Antimicrobial activity of the silver nanoparticles En ligne : https://drive.google.com/file/d/1IjeVq35JlVkkZUgWR5AKGpL321I1NCZx/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14420
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 3 (03/2012) . - p. 85-91[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13825 - Périodique Bibliothèque principale Documentaires Disponible 13828 - Périodique Bibliothèque principale Documentaires Disponible Rapid determination of sulphide in tannery wastewater by spectrophotometry / Chen Shujuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 3 (05-06/2011)
[article]
Titre : Rapid determination of sulphide in tannery wastewater by spectrophotometry Type de document : texte imprimé Auteurs : Chen Shujuan, Auteur ; Zhang Xinshen, Auteur ; Yu Lingyun, Auteur ; Cao Fengmei, Auteur ; Zhao Huanhuan, Auteur ; Li Hui, Auteur Année de publication : 2011 Article en page(s) : p. 121-125 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Teneur en ions sulfures
Molybdène
Réduction (chimie)
Silicium
Spectrophotométrie
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A simple and rapid spectrophotometric flow injection analysis method for the determination of sulphide has been developed. The proposed method was based on the reducibility of sulphide ion by silicon-molybdenum heteropoly acid, resulting in an intense blue complex with absorption at 630nm. The absorbance value of this compound is directly proportional to the concentration. Optimum conditions for determining sulphide were investigated by a univariate method. Under the optimum conditions, a linear calibration graph was obtained over the range 0-200mg l-1, the detection limit was 32.8µg l-1, the relative standard deviation was 1.86 % (n=12) and the standard addition recovery was between 96.12 % and 104.50 %. The method has been satisfactorily applied for the determination of sulphide in tannery wastewater samples. Note de contenu : EXPERIMENTAL PROCEDURES : Reagents and solutions - Apparatus - Recommended procedure.
RESULTS AND DISCUSSION : Preliminary investigation - Optimization of colour solution (R) - Effect of reaction coil length - Effect of sampling volume - Method validation.En ligne : https://drive.google.com/file/d/1aAX9vAx-xk80UuOU1dsoJ7MPfmSLGUif/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11881
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 3 (05-06/2011) . - p. 121-125[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013132 - Périodique Bibliothèque principale Documentaires Disponible Reverse reference flow injection spectrophotometry for the determination of chromium(VI) extracted from leather by artificial perspiration / Li Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)
[article]
Titre : Reverse reference flow injection spectrophotometry for the determination of chromium(VI) extracted from leather by artificial perspiration Type de document : texte imprimé Auteurs : Li Wang, Auteur ; Zhang Xinshen, Auteur ; Li Hui, Auteur ; Dai Shijun, Auteur ; Sun Dongmei, Auteur ; Sun Jing, Auteur ; Yang Yujie, Auteur ; Tong Ling, Auteur Année de publication : 2010 Article en page(s) : p. 262-267 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Teneur en chrome hexavalent
Cuirs et peaux -- Analyse
Extraction (chimie)
Spectrophotométrie
TranspirationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Reverse reference flow injection spectrophotometry for the determination of chromium(VI) extracted from leather by artificial perspiration --- Reverse reference flow injection analysis (r-FIA) is proposed to determine chromium(VI) extracted from finished leather by artificial perspiration. The extraction of chromium(VI in leather and the decolouration of leather extract were investigated.Under the optimal conditions, the linear range of this method was 1-50%g/l ; the detection limit was 0.62%g/l ; the relative standard deviation (n=10) for 10µg/l chromium(VI) was 1,74 %. For leather samples, the corresponding linear range of this method was 0,5-25mg/kg. This method is suitable for automatic and continuous analysis and gives satisfactory results when applied to the determination of chromium(VI) extracted from finished leather by artificial perspiration. En ligne : https://drive.google.com/file/d/1QMTaeWleX8DyQc9tDGKQdgIU123LW46u/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10813
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 6 (11-12/2010) . - p. 262-267[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012670 - Périodique Bibliothèque principale Documentaires Disponible Simultaneous determination of chloride and sulfide in tannery effluents by low pressure ion-exclusion chromatography with post-column spectrophotometric detection / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 5 (09-10/2010)
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