Spectrophotometric determination of hydrazine

被引：140

作者：

Georgea, Mary ^{[1
]}

Nagarajaa, K. S. ^{[1
]}

Balasubramanian, N. ^{[2
]}

机构：

[1] Loyola Coll, LIFE, Dept Chem, Madras 600034, Tamil Nadu, India

[2] Indian Inst Technol, Dept Chem, Madras 600036, Tamil Nadu, India

来源：

TALANTA | 2008年 / 75卷 / 01期

关键词：

hydrazine; 2,4-dinitrophenylhydrazine; spectrophotometry;

D O I：

10.1016/j.talanta.2007.09.002

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Hydrazine is determined spectrophotometrically by forming the derivative 2,4-dinitrophenylhydrazine from 2,4-dinitrochlorobenzene. The formed dinitro derivative undergoes condensation reaction to form the hydrazone with p-dimethylaminobenzaldehyde (P-DAB). The resulting yellow colored product is stable in acidic medium and has a maximum absorption at 458 nm. The colour system obeys Beer's law in the range 0-7 mu g of hydrazine in an overall volume of 25 mL. The molar absorptivity is calculated to be 8.1 x 10(4) L mol(-1) cm(-1) with a correlation coefficient of 0.998. The relative standard deviation is 1.7% (n = 10) at 6 mu g of hydrazine. Interferences due to foreign ions have been studied and the method has been applied for the determination of hydrazine in boiler feed water. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：27 / 31

页数：5

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