摘要
研究了以NTA为活化剂，CTMAB增敏，Mn（Ⅱ）催化KIO4-氧化7-（2-硝基-4-甲基苯偶氮）-8-羟基喹啉-5-磺酸（简称7P8QSS）的反应，建立了催化光度法测定痕量锰的新方法，以509nm为测定波长，Mn（Ⅱ）在O～3.2×10^-9 g·mL^-1的范围内成线性关系，检出限为3.8×101^-1 g·mL^-1，考察了20多种共存离子的影响．用于测定大米、绿豆、小米和土壤中的锰．
A new catalytic spectrophotometric method for the determination of trace amount of Mn （Ⅱ） was developed. The method is based on the oxidation of 7-（2-nitryl-4-methyl phenylazo）-8-hydroxy-qinolin-5-slfonic acid by potassium periodate in the presence of nitrilo triacec acid as an activator and CTMAB as a sensitizer. The wavelengths for the determination was 509 nm. The linear range of determination is 0-3.2×10.9^g·mL^-1 for Mn（Ⅱ）. The determination limit is 3.8×10^-11 g·mL^-1. The interference of foreign ions was studied. The method can be used for the determination of Mn（Ⅱ） in mung bean, rice, cereal and soil samples.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2006年第8期1536-1539,共4页
Spectroscopy and Spectral Analysis
基金
山东省教育厅开放实验室基金(SJ0402)资助
