摘要
在醋酸-醋酸钠缓冲介质中，活化剂氨三乙酸存在下，Mn（Ⅱ）对高碘酸钾氧化结晶紫褪色反应有催化作用。据此建立了测定痕量锰的新催化光度法。方法线性范围0．2～8．0μg／L，检出限为0．076μg／L。对4．0μg／L Mn（Ⅱ）测定的相对标准偏差为1．6％（n=11）。应用于小麦等5种粮食中痕量锰的测定，平均收率均大于96％。
A new catalytic spectrophotometric method was established for the determination of trace manganese, The method was based on the catalytic effect of Mn （ Ⅱ ） on the oxidative discoloration of crystal violet with potassium pefiodate in the buffer medium of HAc - NaAe, with nitfilotfiaeetie acid as activator. The determination range was 0, 2 - 8.0 μg/L and the detection limit was 0. 076 μg/L with the relative standard deviation of 1.6% （ n = 11 ）, The method was used to determine trace manganese in foodstuff with satisfactory results.
出处
《云南化工》
CAS
2008年第2期48-50,共3页
Yunnan Chemical Technology
基金
郧阳师范高等专科学校青年科研基金项目(2006C01)
关键词
结晶紫
锰
催化动力学光度法
粮食
rystal violet
manganese
catalytic kinetic speetrophotometry
foodstuff
