Employment of a single standard solution for analytical curves in flow injection analysis system coupled to solid phase spectrophotometry

Química Nova

Korn, Mauro¹  Universidade do Estado da Bahia, Salvador¹  Oliveira, Fábio Santos de¹  Universidade Federal da Bahia, Salvador¹ 

关键词: flow injection analysis;    solid phase spectrophotometry;    analytical curves.;   

DOI  :  10.1590/S0100-40422003000400004

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work two procedures were proposed for analytical curves construction using a single standard solution employing a flow injection system with solid phase spectrophotometric detection (FI-SPS). A flow cell contends the chromogenic reagent 1-(2-tiazolylazo)-2-naphtol was positioned on the optical path. The first procedure was based on controlled concentration of analyte on solid phase and the relations between absorbance and the total volume of injected allowed the calculation of analyte concentration. The second procedure was developed employing controlled dispersion/retention in flow system where analyte concentration was obtained by exploiting the relation between transient signals of samples and single standard solution at equivalent reading time. The procedures were successfully applied for zinc determination in synthetic solutions with good precision and accuracy at 95% confidence level.

【 授权许可】

Unknown