摘要
研究了聚乙烯吡咯烷酮（ＰＶＰ）对桑色素（ｍｏｒｉｎ）和铅Ｐｂ（Ⅱ）配合反应的增敏作用．发现ｐＨ在３．４３时，Ｐｂ２＋－ｍｏｒｉｎ－ＰＶＰ三元体系在４３５．８ｎｍ激发下，４４４ｎｍ处有强荧光发射．在考察实验最佳条件的基础上，提出了一个荧光光度法测定痕量Ｐｂ（Ⅱ）的新方法，其线性范围为０～２４０ｎｇ／ｍＬＰｂ（Ⅱ），对空白１１次测定ＲＳＤ％为３．５％，最低检出限为２．１×１０－８ｇ／ｍＬＰｂ（Ⅱ）．
A new chemiluminescence reaction of L tyrosine KMnO 4 H 2O 2 is studied by flow injection method. The factors that influences chemiluminescence intensity are investigated. The new method based on the chemiluminescence reaction for the determination of trace L tyrosine has been established by optimizing the experimental conditions. The linear range for the determination of L tyrosine is 1.0×10 -6 ～1.0×10 -4 g/mL, the determination limit is 3.86×10 -7 g/mL.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第3期64-66,81,共4页
Journal of Shaanxi Normal University：Natural Science Edition
