原子吸收光谱法测定钢铁中铬

ATOMIC ABSORPTION SPECTROPHOTOMETRY OF CHROMIUM IN STEELS

本文确定了用原子吸收分光光度计贫燃气空气-乙炔火焰法测定钢铁中铬的测量条件。认为当空气速率为5001/h,乙炔速率为85～901/h时,铁基离子对铬的测定没有干扰。并对杂质元素,酸和氧化剂的干扰进行了研究,指出不需加入抑制剂或释放剂(如Na_2SO_4)。在完成了对溶液中铬的测定后,可直接将该溶液用于其它元素的测定。

Conditions for the atomic absorption spectrophotometric determination of chromium in steels for light weapons are investigated, using lean ratio air-acetylene flames. Ferro-basis (an abundance of ferric ions) does not interfere witn the determination of chromium wheh the rate of airflow is 500 1/h and the acetylene flow 85 1/h to 90 1/h. The interfering factors of other alloying elements, acids, and oxidizers are studied. The method can determine chromium without checking or releasing reagent (eg. sodium sulphate). The sulution can therefore be used directly afterwards for the determination of other elements.