电感耦合等离子体原子发射光谱法测定含铬镍生铁中镍铬锰磷钼铜钴

采用王水并滴加氢氟酸溶解含铬镍生铁样品,高氯酸冒烟,采用标准样品/控制样品制作校准曲线,测定过程采用内标法,实现了使用电感耦合等离子体原子发射光谱法(ICP-AES)测定含铬镍生铁中高镍、高铬以及锰、磷、钼、铜和钴等元素的测定。在仪器工作条件下,各元素校准曲线线性相关系数均大于0.999,其中镍元素线性相关系数达到0.999 9。方法中各元素的检出限为0.002 0～0.020 μg/mL。采用实验方法对含铬镍生铁实际样品中的镍、铬、锰、磷、钼、铜和钴含量进行测定,结果与国家标准化学分析方法基本一致,相对标准偏差(RSD,n=11)在0.53%～5.0%之间。

Determination of nickel,chromium, manganese,phosphorus, molybdenum,copper and cobalt in chromium-nickel pig iron by inductively coupled plasma atomic emission spectrometry

The chromium-nickel pig iron sample was dissolved with aqua regia and hydrofluoric acid (which was added by dripping) followed by perchloric acid fume. The calibration curve was prepared with certified reference materials/control samples. Thus, a method was established for determination of high content nickel and chromium as well as manganese, phosphorus, molybdenum, copper and cobalt in chromium-nickel pig iron by inductively coupled plasma atomic emission spectrometry (ICP-AES) with internal standard method. Under the working conditions of instrument, the linear correlation coefficients of calibration curves for elements all above 0.999. The linear correlation coefficient of nickel was up to 0.999 9. The detection limits of elements of the proposed method were between 0.002 0 μg/mL and 0.020 μg/mL. The proposed method was applied to determine the content of nickel, chromium, manganese, phosphorus, molybdenum, copper and cobalt in chromium-nickel pig iron actual sample. The results were consistent with those obtained by the national standard chemical analysis methods. The relative standard deviations(RSDs, n=11) were between 0.53% and 5.0%.