标准加入ICP-AES法测定氯化钠中Cu、Ni含量

Determination of Copper and Nickel in Sodium Chloride by Standard Addition ICP-AES Method

建立标准加入-电感耦合等离子体原子发射光谱法(ICP-AES)测定氯化钠中Cu、Ni元素的分析方法。确定氯化钠中Cu、Ni的分析谱线为Cu 327.395 nm和Ni 230.299 nm。采用标准加入法消除基体干扰,使用耐高盐的OneNeb雾化器提高信号强度,优选高频发生器功率为1.3 kW,雾化气压力为180 kPa。结果表明:Cu、Ni元素的工作曲线呈线性关系,线性相关系数在0.999以上;Cu元素的检出限为0.000 011%,Ni元素的检出限为0.000 031%;测定结果的相对标准偏差(RSD,n=6)在5%以内,样品的加标回收率为96.0%~102.0%。

A standard addition inductively coupled plasma atomic emission spectrometry(ICP-AES)method has been established to determine copper and nickel in sodium chloride.The analytical spectral lines of copper and nickel in sodium chloride was Cu 327.395 nm and Ni 230.299 nm.The interference of sodium chloride matrix was eliminated by standard addition method,and the highly salt-resistant OneNeb nebulizer was used to increase the signal intensity.The preferred power of the high-frequency(RF)generator was 1.3 kW and the nebulizer gas pressure was 180 kPa.The results show that the calibration curves of copper and nickel are linear,and the linear correlation coefficient is above 0.999.The detection limit of copper is 0.000011%,and that of nickel is 0.000031%.The relative standard deviation(RSD,n=6)of the results is within 5%.The added standard recovery of the samples is in the range of 96.0%~102.0%.