论文部分内容阅读
研究了聚乙烯吡咯烷酮（ＰＶＰ）对桑色素（ｍｏｒｉｎ）和铅（Ⅱ）络合反应的增敏作用，发现ｐＨ３．４３时Ｐｂ－ｍｏｒｉｎ－ＰＶＰ三元体系在４３５ｎｍ激发下，４４４ｎｍ处有强荧光发射，提出了荧光光度法测定痕量Ｐｂ的新方法，其线性范围为０～２４０μｇ／Ｌ，对空白１１次测定ＲＳＤ为３．５％，检出限为２．１×１０－２ｍｇ／Ｌ。对标准人发、潞党参和血清样品的测定，结果满意。
The sensitization of polyvinylpyrrolidone (PVP) to the complexation of morin and lead (Ⅱ) was studied. It was found that the Pb-morin-PVP ternary system at pH3.43 had strong fluorescence at 444nm under the excitation of 435nm A new method for the determination of trace Pb by fluorescence spectrophotometry was proposed. The linear range was 0 ~ 240μg / L, RSD was 3.5% for 11 measurements and the detection limit was 2.1 × 10-2mg / L . The standard human hair, Lu Codonopsis and serum samples were measured, the results were satisfactory.