A sensitive colorimetric method for the determination of nitrite in water supplies, meat and dairy products using ionic liquid-modified methyl red as a colour reagent

被引：51

作者：

Zhang, Haijuan ^{[1
,2
]}

Qi, Shengda ^{[1
,2
]}

Dong, Yalei ^{[1
,2
]}

Chen, Xiaojiao ^{[1
,2
]}

Xu, Yinyin ^{[1
,2
]}

Ma, Yanhua ^{[1
,2
]}

Chen, Xingguo ^{[1
,2
,3
]}

机构：

[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China

[3] Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China

来源：

FOOD CHEMISTRY | 2014年 / 151卷

关键词：

Nitrite; Colorimetric method; Yellow River water; Chicken; Milk; Ionic liquid-modified methyl red; SPECTROPHOTOMETRIC DETERMINATION; NITRATE; ELECTROPHORESIS; HEMOGLOBIN; CONVERSION; OXIDATION; SYSTEM; ACID;

D O I：

10.1016/j.foodchem.2013.11.016

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This paper describes a colorimetric approach to determine trace amounts of nitrite in water supplies, meat and dairy products using 1-butyl-3-methylimidazolium-modified methyl red ([BMIM]MR) as a colour reagent. The technique capitalises on the catalytic effect of nitrite on the oxidative degradation of [BMIM]MR by potassium bromate in acidic media. The absorbances were proportional to nitrite concentrations in the range of 8.70 x 10(-2) to 4.17 mu M with a detection limit of 1.64 x 10(-2) mu M. Compared with the method using methyl red as a colour reagent, 60 times improvement of sensitivity was obtained. Activation energy and the apparent rate constant for the catalytic reaction are 61.11 kJ mol(-1) and 1.18 x 10(4) s(-1), respectively. The proposed method was successfully applied for the analysis of nitrite in Yellow River water, chicken, and milk with recoveries ranging from 96% to 105%. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：429 / 434

页数：6

共 28 条

[1] Spectrophotometric determination of hydroxylamine and nitrite in mixture in water and biological samples after micelle-mediated extraction [J].