Resonance Rayleigh scattering spectrum for the chelate of lanthanum(Ⅲ) with sodium tanshinon ⅡA silate and its analytical application

被引：1

作者：

PENG JingdongLIU ShaopuLIU Zhongfang SHI Yan College of Chemistry and Chemical EngineeringSouthwest China Normal UniversityChongqing China ^{[400715
]}

机构：

来源：

Science in China(Series B:Chemistry) | 2006年 / 05期

关键词：

lanthanum(Ⅲ); sodium tanshinon ⅡA silate; chelate; resonance Rayleigh scattering; analytical application;

D O I：

暂无

中图分类号：

O614.331 [];

学科分类号：

070301 ; 081704 ;

摘要：

In a pH 3.6―5.0 HAc-NaAc buffer solution, when sodium tanshinon ⅡA silate (STSⅡA) reacts with La(Ⅲ) to form a chelate, the resonance Rayleigh scattering (RRS) intensity can be en-hanced greatly and a new RRS spectrum will appear. The maximum RRS peak is located at 306 nm and the RRS intensity is proportional to the concentration of STSⅡA in a certain range. The method is very sensitive and the detection limit for STSⅡA (3σ/K) is 82.12 ng·mL?1. The optimum reaction condi-tions and the effect of coexisting substances have been investigated. A new, simple and fast method for the determination of STSⅡA based on RRS method is developed. It can be applied to the deter-mination of STSⅡA in the synthesis samples and Nuoxinkang injection. Combined with infrared ab-sorption and NMR spectra, the structure of the chelate and the reasons of RRS enhancement are also discussed.

引用

页码：423 / 429

页数：7

共 12 条

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