碳钢及低合金钢中磷和硅的流动注射联合测定

Determination of Phosphorus and Silicon in Carbon Steel and Low Alloy Steel by Flow Injection Analysis

该方法以钼蓝法为基础,在试样溶解后,用NH4F处理,消除了钼酸铁的干扰,实现了钢中磷和硅的流动注射分析。分析方法均以试样溶液为载流,汇入含钼酸铵的溶液,形成杂多酸,然后,定量注入还原剂,形成钼蓝后进行测定。方法简便、快速,适用于碳钢及低合金钢的成批分析。

The determination is based on molybdic blue method. Samplo solution is treated with NH4F to eliminate the interference of ferric molybdate. The sample solution is used as loaded flow and mixed with ammonium molybdate solution to form hetropolyacid. After that a fixed amount of reducing agent is injected in forming molybdic blue for determination of phosphorus and silicon. The method is simple and rapid in analysis of carbon and alloy steel.