SPECTROPHOTOMETRIC DETERMINATION OF TANNIN IN TANNING EFFLUENT WITH A FLOW-INJECTION SYSTEM

被引：12

作者：

DRESSLER, VL ^{[1
]}

MACHADO, EL ^{[1
]}

MARTINS, AF ^{[1
]}

机构：

[1] UFSM,DEPT CHEM,BR-9711990 SANTA MARIA,BRAZIL

来源：

ANALYST | 1995年 / 120卷 / 04期

关键词：

FLOW INJECTION; SPECTROPHOTOMETRY; TANNIN; TANNING EFFLUENT;

D O I：

10.1039/an9952001185

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The use of the Folin-Ciocalteu reagent in the spectrophotometric determination of polyphenolic substances (total tannins) in tanning effluent by means of a chemical analysis system based on flow injection (FI) is described. Chemical variables and variables related to the FI system were evaluated. The proposed method permits the execution of up to 250 determinations per hour, with good precision (relative standard deviation <3%, n = 10) and a broad linear range (5.0-100.0 mg l(-1) tannin). The results are comparable to those obtained by the conventional method for the determination of tannic acid (114.3 +/- 6.4 and 111.7 +/- 3.2 mg l(-1) tannin for the proposed FI system and the conventional method, respectively).

引用

页码：1185 / 1188

页数：4

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