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]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
012255	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

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]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
011279	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 96, N° 5 (09-10/2012) . - p. 215-219 Titre : Rapid determination of nitrate in tannery effluent by reverse flow injection analysis Type de document : texte imprimé Auteurs : Xiao Kai, Auteur ; Yu Lingyun, Auteur ; Zhang Xinshen, Auteur ; Yu Lan, Auteur Année de publication : 2012 Article en page(s) : p. 215-219 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eaux usées -- Analyse Eaux usées -- Teneur en nitrates Spectrophotométrie Tannage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to control the pollution by nitrate, a simple, accurate and sensitive reverse flow injection analysis (rFIA) spectrophotometric method for determination of nitrate in tannery effluent is proposed in this paper. Firstly, in alkaline medium and with copper ion as catalyst, nitrate is reduced to nitrite by hydrazine sulfate. Then in acid condition, nitrate and sulfanilamide are diazotized. The diazo material is then coupled with N-1-naphthyl ethylenediamine hydrochloride (NEH) to form a red product. The absorbance of the complex compounds is measured at 540nm. Chemical factors ad rFIA variables affecting the system are also discussed. Under the otimal conditions, the linear range of this method was 50-5000µg l-1 ; the detection limit was 7µg 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 nitrate in tannery effluent. Note de contenu : - EXPERIMENTAL PROCEDURE : Apparatus - Reagents - Procedure - RESULTS AND DISCUSSION : Detection principle - ANALYTICAL PROCESS PARAMETERS : Other factors examined En ligne : https://drive.google.com/file/d/1SwD9lHJItN9viiIjqPA3Qb30qjtjBbJL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16207 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14228	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
011791	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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)  

Permalink

---

1 (1 - 6 / 6)