Determination of PO4-P in tannery effluent by reverse reference flow injection / Xie Yonghong 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. 168-171 Titre : Determination of PO4-P in tannery effluent by reverse reference flow injection Type de document : texte imprimé Auteurs : Xie Yonghong, Auteur ; Zhang Xinshen, Auteur ; Wang Wenxian, Auteur ; Huang Jin, Auteur ; Wei Liang, Auteur Année de publication : 2007 Article en page(s) : p. 168-171 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Reverse reference flow injection analysis (rFIA) was proposed to determine PO4-P in tannery effluent combined with phosphorus antimony molybdenum blue photometry (deoxidized reagent is L-ascorbic acid). The result showed that, under the optimal conditions, good linear work curve with high sensitivity and broad linear range was obtained with this method to determine PO4-P. The linear ranges were 6 x 10-4-6 x 10-2 and 6 x 10-2-5mg/l, the detection limit of this method was 0.18μg/l, and relative standard deviation (RSD) of 3.03% (n = 11) was obtained by injecting a standard solution with 10μg/l PO4-P. This method was used to analyze the PO4-P in tannery effluent with recovery ranging from 96.0% to 97.8%. Note de contenu : - EXPERIMENTAL PROCEDURES : Chemical reagents - Apparatus - Preparation of solutions - Analytical procedure - Preparation of the samples - PREPARATION OF THE SAMPLES : Choice of the detection wavelength - Choice of pump tubes - Choice of flow path - Choice of reaction coil - Choice of sampling volume - Optimization of reaction solution - Test of linearity, precision and detection limit - Effects of foreign ions - Recovery test and analysis of the samples - Table 1 : Linearity and detection limit of the method - Table 2 : Recovery percentage and analytical result of samples En ligne : https://drive.google.com/file/d/1LasaU2ZAJxHWat4skVZTXqHSAEK5hM61/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39024 [article]

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Determination of volatile phenol in tannery effluent / Xie Yonghong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 1 (01-02/2008)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 1 (01-02/2008) . - p. -30-33 Titre : Determination of volatile phenol in tannery effluent Type de document : texte imprimé Auteurs : Xie Yonghong, Auteur ; Zhang Xinshen, Auteur ; Wang Wenxian, Auteur ; Huang Jin, Auteur ; Wei Liang, Auteur Année de publication : 2008 Article en page(s) : p. -30-33 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 Composés organiques volatils Eaux usées -- Analyse Phénol Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A sensitive, accurate and relatively interference-free flow injection analysis (FIA) is proposed here to determine volatile phenol in tannery effluent. The method combinines 4-amino-antipyrine (4-AAP) photometry using potassium ferricyanide [K3Fe(CN)6] as oxidant and 4-AAP as colour developing reagent. The results showed that, under optimal conditions, a good linear curve with high sensitivity and broad linear range was obtained: the peak height was truly linear with the concentration of volatile phenol in the range of 4 x 10-4-4, 4-6 and 6-8mg/l. The detection limit of this method was 3.4 x 10-4mg/l. The relative standard deviation (RSD) was 0.85% (n = 14) by injecting tannery effluent. Satisfactory results were achieved using this method to determine the volatile phenol in tannery effluent with recovery percentages ranging from 94.9 to 99.1%. Note de contenu : - EXPERIMENTAL PROCEDURE : Main chemical reagents - Apparatus - Preparation of solutions - Preparation of the samples - Analytical procedure - RESULTS AND DISCUSSION : Detection wavelength - Effect of pump duct diameter - Effect of the flow path - Effect of the reaction coil length - Effect of sampling volume - Effect of flow-through cell - Optimizing of reaction solution - Effects of foreign ions - Test of linearity, precision and detection limit - Determination of the samples and recovery test - Table 1 : Linearity of the method - Table 2 : Recovery percentage and analytical result of samples En ligne : https://drive.google.com/file/d/1aKNMlbaPj_cdI6Yj9Ir2eRt0XJ5BJxB9/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38919 [article]

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On-line determination of tannic acid in leather wastewater by flow injection spectrophotometry / Wei Liang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 3 (05-06/2008) . - p. 127-129 Titre : On-line determination of tannic acid in leather wastewater by flow injection spectrophotometry Type de document : texte imprimé Auteurs : Wei Liang, Auteur ; Zhang Xinshen, Auteur ; Huang Jin, Auteur ; Xie Yonghong, Auteur ; Xiao Kai, Auteur Année de publication : 2008 Article en page(s) : p. 127-129 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Cuirs et peaux Eaux usées -- Analyse Spectrophotométrie Tanins Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A rapid, simple, reliable and automatic method was proposed for on-line determination of tannic acid in leather wastewaters. Based on the tannic acid reduction of phosphotungstic acid to form a blue compound in pH12.38 alkaline solutions, the shade of the blue compound is in a linear relation to the content of tannic acid at the maximum absorption peak of 700nm. The optimal experimental conditions have been obtained. The linear range of the proposed method was between 200μg L-1 to 50mg L-1. The relative standard deviation was 3.21% and 2.06% for 500μg L-1 and 20mg L-1 of tannic acid standard solution respectively (n = 10). The method had been successfully applied to determination of tannic acid in leather wastewater samples and the analytical results were satisfactory. Note de contenu : - EXPERIMENTAL PROCEDURE : Chemical regents - Apparatus - Preparation of solution - ANALYTICAL PROCEDURE - RESULTS AND DISCUSSION : Choice of the detection wavelength - Effect of flow rate - Effect of phosphotungstic acid reagent solution (R1) - Effects of pH - Effect of the reaction coil length - Effect of sample volume - Effects of foreign ions - Linearity and precision of the proposed method - Application - Table 1 : Determination of tannic acid in leather wastewater by the proposed method Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38958 [article]

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A reliable method to determine sulfide in tannery effluent / Xie Yonghong 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. 21-24 Titre : A reliable method to determine sulfide in tannery effluent Type de document : texte imprimé Auteurs : Xie Yonghong, Auteur ; Zhang Xinshen, Auteur ; Wang Wenxian, Auteur ; Li Hua, Auteur ; Yuan Dong, Auteur ; Huang Jin, Auteur Année de publication : 2007 Article en page(s) : p. 21-24 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 sulfures Solutions (chimie) Spectrophotométrie Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A rapid, reliable and sensitive online method was proposed to determine sulfide ion in tannery effluent based on the combination of methylene blue spectrophotometry and automatic reference Flow Injection Analysis. In acidic media with Fe3+, without any process of H2S absorption or sample pre-distillation, sulfide could be determined directly by the automatic reference FIA function of an automatic metallic elements analyzer using p-aminodimethylaniline dimethylaniline (C6H4•NH2•N (CH3)2•2HCl) as colour developing reagent. Under the optimal conditions, the linear ranges of this method were 0.01 - 0.25 and 0.20 - 2.16µg/ml; the detection limit was 4.642ng/ml, and relative standard deviations were 2.5% (n = 8) for a 3 x diluted tannery effluent. Asatisfied result was achieved with the proposed method to determine the sulfide in tannery effluent, and then the range of recovery percentages was 96.0 - 104.0%. Note de contenu : - EXPERIMENTAL PROCEDURE : Chemical reagents - Apparatus - Preparation of solutions - ANALYTICAL PROCEDURE : Preparation of the samples - RESULTS AND DISCUSSION : Choice of the detection wavelength - Choice of pump tubes - Choice of the reaction coil - Choice of the flow path - Choice of sampling volume - Optimizing of Reagent solution - Test of linearity, precision and detection limit - Effects of foreign ions - Analysis of the samples - Table 1 : Linearity and detection limit of the method En ligne : https://drive.google.com/file/d/1eGz7yIy-5m839V4Is2EOmzfbnLrledKb/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39043 [article]

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