中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 溴酸钾氧化二甲基黄动力学光度法测定食品中的痕量硒(英文) 食品科学 2006,27 (1) 181-186
Position: Home > Articles > Kinetic Spetrophotometric Determination of Trace Selenium (IV) in Foodstuff Based on Its Catalytic Effect on the Oxidation of Dimethyl Yellow with Potassium Bromate FOOD SCIENCE 2006,27 (1) 181-186

溴酸钾氧化二甲基黄动力学光度法测定食品中的痕量硒(英文)

作  者：
周之荣;周利民;许文苑;熊艳
单  位：
东华理工学院应用化学系
关键词：
硒;催化光学法;食品;二甲基黄;溴酸钾
摘  要：
基于0.004mol/L的HNO3介质中,在乳化剂OP存在时,痕量硒催化溴酸钾氧化二甲基黄的褪色反应,建立了测定痕量硒的催化光度法。方法检出限为0.015μg/L,线性范围为0～0.8μg/L。加标回收率为98.0%～102.5%,样品测定的相对标准偏差(RSD)为2.6%～4.3%。用于测定食品中的痕量硒,结果满意。
译  名：
Kinetic Spetrophotometric Determination of Trace Selenium (IV) in Foodstuff Based on Its Catalytic Effect on the Oxidation of Dimethyl Yellow with Potassium Bromate
作  者：
ZHOU Zhi-rong,ZHOU Li-min,XU Wen-yuan,XIONG Yan (Department of Applied Chemistry, East China Institute of Technology, Fuzhou 344000, China)
关键词：
selenium;catalytic spectrophotometry;foodstuffs;dimethyl yellow;potassium bromate
摘  要：
A spectrophotometric method for the determination of selenium (IV) is described, based on the selenium (IV)- catalyzed oxidation of dimethyl yellow with potassium bromate in 0.004 mol/L nitric acid solution medium and in the presence of OP emulsifier(p-iso-octyl phenoxy polyethoxy ethanol). As the redox reaction proceeds, the red color of dimethyl yellow is decolorized. The value of ΔA shows a good linear relationship with the amounts of selenium (IV) (A0: absorbance of uncatalyzed reaction solution; A: absorbance of catalyzed reaction solution). The results show that the maximum absorption is at 530 nm and the detection limit of the method for Se(IV) is 0.015μg/L. Beer's law is obeyed for Se (IV) in the range of 0.00～0.80μg/L. The recoveries are 98.0%～102.5%, and the relative standard deviations (RSD) are 2.6%～4.3%. The method has been applied to the determination of trace selenium (IV) in egg and wheat samples, and satisfactory results were obtained.

相似文章

导出引用
计量
文章访问数: 11
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46