| 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 |
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in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 3 (05-06/2008) . - p. 127-129
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On-line determination of tannic acid in leather wastewater by flow injection spectrophotometry in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)
