电感耦合等离子体原子发射光谱法测定金属锰中硅磷铁

Determination of silicon,phosphorus and iron in manganese metal by inductively coupled plasma atomic emission spectrometry

提出了使用电感耦合等离子体原子发射光谱法测定金属锰中硅、磷、铁的分析方法。实验确定了以稀硝酸分解样品,选择Si 251.611 nm,P 178.229 nm,Fe 259.940 nm光谱线分别作为硅、磷、铁的分析线,同时研究了基体效应。通过在校准曲线溶液中加入与待测样品等量的锰,补偿了基体组分引起的基体效应。对金属锰标样进行加标回收试验,得到回收率在98.0%~100.5%间。用本法测定了GSB H42018和DH7701金属锰标样,测定值与认定值基本一致,相对标准偏差小于1%（n=6）。

The determination of silicon,phosphorus and iron in manganese metal by inductively coupled plasma atomic emission spectrometry（ICP-AES） was developed.The samples were decomposed with diluted nitric acid.The Si 251.611 nm,P 178.229 nm and Fe 259.940 nm were used as the analytical lines of silicon,phosphorus and iron.Meanwhile,the matrix effect was studied.By adding equal amount of manganese into calibration curve solution,the matrix effect caused by matrix component was compensated.The recovery test of metal manganese standard sample was conducted with the recovery rates of 98.0 %-100.5 %.This method was applied to determine GSB H42018 and DH7701 manganese metal standard samples.The measurement results were consistent with the certified values,and the relative standard deviations（RSD,n=6） were smaller than 1 %.