Determination of surfactants in leather wastewater by flow injection spectrophotometry / Yuan Dong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 1 (01-02/2007)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 1 (01-02/2007) . - p. 19-20 Titre : Determination of surfactants in leather wastewater by flow injection spectrophotometry Type de document : texte imprimé Auteurs : Yuan Dong, Auteur ; Zhang Xinshen, Auteur ; Fu Dayou, Auteur ; Tu Jie, Auteur ; Zou Yuquqn, Auteur ; Li Xiang, Auteur Année de publication : 2007 Article en page(s) : p. 19-20 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Cuirs et peaux Eaux usées -- Analyse Eaux usées -- Teneur en surfactants Spectrophotométrie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A simple flow injection spectrophotometric method based on the reaction of malachite green with sodium dodecylbenzenesulfonate (SDBS) was proposed to determine surfactants in leather wastewater. SDBS was determined in a Na2HPO4 -KH2PO4 buffer solution (pH7.0) at 622nm. Under the optimum conditions, the linear range for SDBS was 0.05-3.0mg l-1, and the relative standard deviation (n = 9) for 0.5mg/L SDBS was 0.81%. The proposed FI method has been applied to the determination of anionic surfactants in leather wastewater with satisfactory results. Note de contenu : - EXPERIMENTAL PROCEDURE : Reagents - Apparatus - Preparation of solutions - Flow injection procedure - RESULTS AND DISCUSSION : Choice of pH - MG concentration - Effect of flow rate - Effect of reaction coil length - Samping volume - Effects of interference ions - RESULTS - Table 1 : Determination of surfactants in leather wastewater - as SDBS En ligne : - EXPERIMENTAL PROCEDURE : Reagents - Apparatus - Preparation of solutions - Flo [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39042 [article]

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Direct spectrophotometric determination of formaldehyde in leather wastewater by flow injection analysis with chromotropic acid / Zou Yuquan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 4 (07-08/2007)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 4 (07-08/2007) . - p. 142-144 Titre : Direct spectrophotometric determination of formaldehyde in leather wastewater by flow injection analysis with chromotropic acid Type de document : texte imprimé Auteurs : Zou Yuquan, Auteur ; Zhang Xinshen, Auteur ; Long Fucai, Auteur ; Yuan Dong, Auteur ; Tu Jie, Auteur Année de publication : 2007 Article en page(s) : p. 142-144 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Chromotropique, Acide Eaux usées -- Analyse Eaux usées -- Teneur en formaldéhyde Spectrophotométrie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A sensitive and relatively interference-free spectrometric method for determination of formaldehyde in leather wastewater is described. The method is based on the combination of chromotropic acid with formaldehyde under acidic conditions with heating. The absorbance of the complex is measured spectrophotometrically at 390nm. Chemical factors and FIA variables affecting the system are also discussed. The linearity concentration range of the calculation curve was from 0.05 to 1000mg l-1 of standard solutions. The relative standard deviation was 0.42% (n = 11) obtained by injecting 200∝g l-1 standard formaldehyde solution. The detection limit was 0.003mg l-1 calculated from three times the average background noise. The proposed method was successfully applied to determine formaldehyde in varied samples of leather wastewater. Note de contenu : - MATERIALS AND METHODS : Apparatus - Reagents - Sample preparation - Analytical procedure - RESULTS AND DISCUSSION : Effect of chemical factors - Effect of the FIA parameters - Interference study - Application of the method - Table 1 : Determination of formaldehyde in leather wastewaters En ligne : https://drive.google.com/file/d/1eJSs1CY9uhOt8G8hbB9XUECn9lnvlju-/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39018 [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 flow injection spectrophotometric determination of chloride ion in tannery effluent / Yu Lingyun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 2 (03-04/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 2 (03-04/2009) . - p. 46-50 Titre : On-line flow injection spectrophotometric determination of chloride ion in tannery effluent Type de document : texte imprimé Auteurs : Yu Lingyun, Auteur ; Tu Jie, Auteur ; Xiao Kai, Auteur ; Dai Shijun, Auteur ; Tong Ling, Auteur ; Sun Dongmei, Auteur ; Zhang Xinshen, Auteur Année de publication : 2009 Article en page(s) : p. 46-50 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The chloride ion (Cl-) is very important to both human and animal health, and directly impacts on the natural environment. This paper proposes a simple, accurate, sensitive and selective flow injection catalytic kinetic spectrophotometric method for the rapid determination of chloride ion in tannery effluent. in acidic media and with heat, the reaction of indigo carmine and potassium bromate is catalysed by the chloride ion. The absorbance of this reaction solution was recorded at 610nm. Chemical factors and FIA variables affecting the system were also discussed. The linear concentration range of the calibration curve was from 0.2-420mg L-1 of standard solutions. The relative standard deviation was 0.88 % for 28.0mg l-1 chloride ion( n=9), and the detection limit was à.009mg l-1 calculated from three times the average background noise. This method, which is suitable for automatic continuous analysis, has been successfully applied to the determination of chloride ion in tannery effluent. En ligne : https://drive.google.com/file/d/1t7fxY4E5Cd-uVKjySpObOeZ5DgtZ5O6F/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5091 [article]

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Simultaneous assay of trace Cr(VI) and total chromium in tannery effluent. Using flow injection spectrophotometry with Ce(IV) as oxidant / Dai Shijun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 6 (11-12/2009)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 6 (11-12/2009) . - p. 245-249 Titre : Simultaneous assay of trace Cr(VI) and total chromium in tannery effluent. Using flow injection spectrophotometry with Ce(IV) as oxidant Type de document : texte imprimé Auteurs : Dai Shijun, Auteur ; Zhang Xinshen, Auteur ; Yu Lingyun, Auteur ; Xiao Kai, Auteur ; Tong Ling, Auteur ; Sun Dongmei, Auteur ; Tu Jie, Auteur Année de publication : 2009 Article en page(s) : p. 245-249 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A rapid and sensitive method is described for flow injection spectrophotometric determination of trace Cr(VI) and total chromium in tannery effluent. The method is based upon the classical reaction of Cr(VI) with diphenylcarbazide (DPC) to form a water-soluble complex (lambda max=540nm). Cr(III) reacts with DPC only after its on-line oxidation to Cr(VI) by Ce(SO4). Under the optimized conditions, the calibration curves were linear over the range 5-100µg 1-1 and 2à-200 µg 1-1 for Cr(VI) and total chromium, respectively, while the precision close to the quantification limit was satisfactory in both cases (Sr=0.49 % for Cr(VI) and 0.94 % for total chromium (n=10) at the same level, 50µg 1-1, respectively). the application of the method to the analysis of tannery effluent gave accurate results based on recovery studies (98.7-103.3 %). Analytical results of total chromium tannery effluent were in good agreement with that of reference method. En ligne : https://drive.google.com/file/d/19oe3FnTy-paoZE_mXtezaJPqU4Sat55U/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7347 [article]

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