流动注射光度法测定阳极泥中微量锇

Determination of Micro-osmium in the Anode Mud by Flow Injection Analysis

目前,流动注射分析已广泛应用于许多元素和物质的快速测定。但锇的流动注射分析方法至今未见报道。本文根据γ-酸(7-氨基-1-萘酚-3-磺酸)被空气中的氧氧化后生成血红色醌的反应能被微量Os(Ⅷ)催化的原理,在文献的基础上,采用自制的集成微管道,建立了用合并带-停流技术测定Os(Ⅶ)的流动注射分析方法。该方法具有快速简便、节省试剂。

A procedure was established for the determination of micro Os (Ⅷ) in the anode mud by flow injection analysis-integrated microconduit made by ourselves. This metnod is based on the velocity of γ-acid oxided by oxygen in air to form quinone(red) and the reaction is catalyzed by Os(Ⅷ). The proposed method is rapid, simple and low reagent consumption. The limit of detection for Os (Ⅷ) is 0. 010 μg/mL and relative standard deviation is 2. 1% in the concentration range of 0. 010-0. 100 μg/mL. Sampling frequency is 20 times per hour.