流通式整体光纤型比色计测定高氯酸盐。

Flow-through bulk optode for the fluorimetric determination of perchlorate.

机构信息

Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30071 Murcia, Spain.

出版信息

Talanta. 2003 Jun 13;60(2-3):563-9. doi: 10.1016/S0039-9140(03)00189-9.

Abstract

A flow-through fluorescence bulk optode for the flow-injection determination of perchlorate is described. As the active constituents the optode incorporates the lipophilized pH indicator fluorescein octadecyl ester and methyl tridodecyl ammonium chloride, dissolved in a plasticized poly (vinyl) chloride membrane entrapped in a cellulose support. The optode is applied in conjunction with the flow injection technique for perchlorate determination at pH 4.5 (acetic-acetate). The sensor is readily regenerated with the pH 10.4 (TRIS) carrier solution. The analytical characteristics of this optode with respect to perchlorate response time, dynamic measurement range, reproducibility and selectivity are discussed. The proposed FI method is applied to the determination of perchlorate in waters from different sources.

摘要

一种用于流动注射测定高氯酸盐的流通式荧光体光纤传感器被描述。作为活性成分，光纤传感器包含亲脂化的 pH 指示剂荧光素十八酯和甲基三癸基氯化铵，溶解在包埋在纤维素载体中的增塑聚（氯乙烯）膜中。该光纤传感器与流动注射技术一起用于在 pH 4.5（乙酸-乙酸盐）下测定高氯酸盐。传感器可以用 pH 10.4（TRIS）载体溶液轻松再生。讨论了该光纤传感器在高氯酸盐响应时间、动态测量范围、重现性和选择性方面的分析特性。所提出的 FI 方法被应用于不同来源水样中高氯酸盐的测定。