期刊
ANALYTICA CHIMICA ACTA
卷 590, 期 2, 页码 253-259出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2007.03.042
关键词
formaldehyde; spectrophotometric method; kinetic determination; rhodamine B
A simple and sensitive kinetic-spectrophotometric method was developed for the determination of ultra trace amount of formaldehyde in food samples. The method was based on the oxidation of rhodamine B (RhB) by potassium bromate in sulfuric acid medium (formaldehyde as catalyst). The reaction was monitored by measuring the decrease in absorbance of the dye at 515 mn after 6 min. The developed method allowed the determination of formaldehyde in the range of 10-100 mu gL(-1) with good precision, accuracy and the detection limit was down to 2.90 mu g L-1. The relative standard deviations for the determination of 10 and 60 mu g L-1 of formaldehyde were 3.0% and 1.9% (n = 10), respectively. The method was found to be sensitive, selective and was applied to the determination of formaldehyde in foods with satisfactory results. (c) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据