Anionic surfactants : determination by flow injection spectrophotometry. Measurement of trace amounts in tannery effluent without liquid-liquid extraction / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 5 (09-10/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 5 (09-10/2009) . - p. 183-185 Titre : Anionic surfactants : determination by flow injection spectrophotometry. Measurement of trace amounts in tannery effluent without liquid-liquid extraction Type de document : texte imprimé Auteurs : Yu Lingyun, Auteur ; Zhang Xinshen, Auteur ; Yang Yujie, Auteur ; Yu Lan, Auteur ; Sun Jing, Auteur ; Liu Hongyan, Auteur ; Tong Ling, Auteur ; Sun Dongmei, Auteur Année de publication : 2009 Article en page(s) : p. 183-185 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In order to control the pollution by anionic surfactants in water, and detect anionic surfactants on-line, a simple, accurate and sensitive flow injection spectrophotometric method for simultaneous determination of anionic surfactant in water is proposed in this paper. The method is based on the ion associate formed between sodium dodecylbenzenesulfonate and ethyl violet. Lthe absorbance of the complex is measured using an optical detector at 587nm. Chemical factors and FIA variables affecting the system are also discussed. Under the optimal conditions, the linear range of this method was 10.00-3000.00µ 1-1 ; the detection limit was 0.25µg 1-1 ; the relative standard deviation was 0.814%. This method is suitable for automatic and continuous analysis, and successfully applied to simultaneously determine the content of anionic surfactant in tannery effluent. En ligne : https://drive.google.com/file/d/1y4ake9Jl4MEGkVFTIY-2waewlzP6J2-9/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6277 [article]

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Flow injection spectrophotometric determination of proteins in tannery effluents / Yu Lan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 5 (09-10/2012) . - p. 183-188 Titre : Flow injection spectrophotometric determination of proteins in tannery effluents Type de document : texte imprimé Auteurs : Yu Lan, Auteur ; Yu Lingyun, Auteur ; Zhang Xinshen, Auteur Année de publication : 2012 Article en page(s) : p. 183-188 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Analyse Eaux usées -- Teneur en protéines Spectrophotométrie Tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A rapid and sensitive flow injection spectrophotometric method is described for the determination of proteins based on the principle that Aluminum-Alizarin Red S-bovine serum albumin (BSA)-Triton X-100 complex reacts rapidly with proteins to form complexes in pH4.0 weak acid medium, which causes the change of absorption spectra, the maximum absorption peak of the system is located at 500nm. The absorbance difference is linearly related with the concentration of BSA over the range of 5-120mg l-1. The detection limit of the method was 1.42mg l-1. The method was successfully used to determine protein content in leather wastewater samples and the determined results were in good agreement with the spectrophotometry. The relative standard deviation for 11 replicate determinations of the method was 1.12% for 60mg l-1. The standard addition recovery of the method was from 101.29% to 117.32%. Note de contenu : - EXPERIMENTAL PROCEDURES : Reagents and solutions - Apparatus - Analytical procedure - RESULTS AND DISCUSSION : Choice of the detection wavelength - Effect of chemical reaction variables - Effect of flow injection variables - Calibration curve, reproducibility and detection limit En ligne : https://drive.google.com/file/d/1sQ5EC3XUWEbN3sdr7LDKmCP4WsX2_Mk1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16194 [article]

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Kinetic spectrophotometric flow injection determination of hyamine cationic surfactants in tannery effluent / Tu Jie in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 3 (05-06/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 3 (05-06/2009) . - p. 114-117 Titre : Kinetic spectrophotometric flow injection determination of hyamine cationic surfactants in tannery effluent Type de document : texte imprimé Auteurs : Tu Jie, Auteur ; Zhang Xinshen, Auteur ; Dai Shinjun, Auteur ; Yu Lingyun, Auteur ; Tong Ling, Auteur ; Sun Dongmei, Auteur ; Liu Hongyan, Auteur ; Yu Lan, Auteur Année de publication : 2009 Article en page(s) : p. 114-117 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A flow injection analysis coupled with catalytic spectrophotometry is proposed for simple and rapid determination of trace hyamine cationic surfactants (CSs) in tannery effluent and environmental water. The scheme is based on the markedly catalytic reaction of cationic surfactants, i.e., cetyltrimetylammonium bromide (CTMAB) and cetylpyridinium bromide (CPB) which, on oxidation using KIO4 inhighly acidic hydrochloric acid medium discolour Arsenazo (III). Under the optimum conditions, the linear ranges for CTMAB and CPB are 0.1-20mg 1-1, and all relative coefficients of the two Css in different subsections of the linear ranges exceeds 09986 (n=11). The detection limits (3delta) of both the CSs are 0.08mg 1-1, and the recoveries range from 95.7 % to 103.1 %. The relative standard deviation (R. S. D.) is 1.21 % for 2mg 1-1 CTMAB standard solution (n = 21). The developed method, which is suitable for automatic and continuous analysis, can monitor 15 samples per hour. It has been applied successfully to tannery effluent and environmental water samples. En ligne : https://drive.google.com/file/d/1bSNhFCYzjdUi2t9M9eL2YXWic3mnL6IC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5941 [article]

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On-line determination of nitrite in tannery effluent by reverse reference flow injection / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 3 (05-06/2010)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 94, N° 3 (05-06/2010) . - p. 124-128 Titre : On-line determination of nitrite in tannery effluent by reverse reference flow injection Type de document : texte imprimé Auteurs : Yu Lingyun, Auteur ; Zhang Xinshen, Auteur ; Xiao Kai, Auteur ; Yu Lan, Auteur ; Cao Fengmei, Auteur ; Zhao Huanhuan, Auteur ; Sun Jing, Auteur ; Yang Yujie, Auteur Année de publication : 2010 Article en page(s) : p. 124-128 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie Eaux usées -- Analyse Eaux usées -- Teneur en nitrites Tannage Index. décimale : 628.5 Pollution et hygiène industrielle Résumé : In order to control the pollution of nitrite, a sample, accurate and sensitive reverse reference flow injection analysis (ffRIA) spectrophotometric method for determination of nitrite in tannery effluent is proposed. In acid conditions, nitrite with sulfanilamide is diazotized, and then the diazo material is coupled with N-1-naphthyl ethylenediamine hydrochloride (NEH) to form a red product. The absorbance of the complex compound is measured at 540nm. Chemical factors and rrFIA variables affecting the system are also discussed. Under the optimal conditions, the linear range of this method was 0-50.0 g l-1 ; the detection limit was 0.03 g l-1 ; the relative standard deviation was 0.844 %. This method was suitable for automatic and continuous analysis, and successfully applied to determine the content of nitrite in tannery effluent. En ligne : https://drive.google.com/file/d/1IjQ-QNO09ZI37wg98Nbq6ciy4dyMLAF-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9627 [article]

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On-line determination of sulphide in tannery effluent by flow injection analysis / Yu Lan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 6 (11-12/2012)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 6 (11-12/2012) . - p. 256-260 Titre : On-line determination of sulphide in tannery effluent by flow injection analysis Type de document : texte imprimé Auteurs : Yu Lan, Auteur ; Yu Lingyun, Auteur ; Zhang Xinshen, Auteur Année de publication : 2012 Article en page(s) : p. 256-260 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption Alizarine L'alizarine est un colorant rouge d'origine végétale, extrait de la racine de la garance des teinturiers (Rubia tinctorum L.), une plante vivace de la famille des Rubiacées, autrefois largement cultivée pour la teinture qu'elle fournissait. Eaux usées -- Analyse Eaux usées -- Teneur en ions sulfures Spectrophotométrie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A simple and rapid spectrophotometric method for the determination of sulphide has been developed using flow injection analysis. The proposed method is based on the reducibility of sulphide ion towards alizarin red S resulting in an intense red complex with a suitable absorption peak at 515nm. 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 for determining sulphide were investigated by a univariate method. Under the optimum conditions a linear calibration graph was obtained over the range 0.01-4.0mg l-1, the detection limit was 4.0µg l-1, the relative standard deviation was 1.04% (n=13) and the standard addition recovery was between 103.7 % and 106.0%. The method has been statisfactorily applied for the determination of sulphide in tannery effluents. Note de contenu : - EXPERIMENTAL PROCEDURES : Reagents and solutions - Apparatus - Recommended procedure - RESULTS AND DISCUSSION : Choice of the detection wavelength - Preliminary investigation - Method validation En ligne : https://drive.google.com/file/d/1XPjHGxfqxtejEazRX9Sa4CIg11o9T41n/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16810 [article]

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Rapid determination of nitrate in tannery effluent by reverse flow injection analysis / Xiao Kai in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 5 (09-10/2012)  

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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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Simultaneous online visible detection of sulphide and chloride in tannery effluent by combination of fia and low pressure ion chromatography / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 6 (11-12/2009)  

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