摘要
采用过氧化钠-氢氧化钠混合试剂熔融钨矿石样品,用酒石酸-盐酸体系酸化提取制备样品溶液,采用电感耦合等离子体原子发射光谱法测定样品溶液中上述7种元素的含量。选择硅、铁、铝、钛、钨、钼和锡的分析谱线分别为251.61,259.94,396.15,334.94,239.71,202.03,189.98nm。7种组分在一定的质量浓度范围内与其对应元素的光谱强度呈线性关系,方法的检出限（3s）在0.000 24~0.063 mg·g^-1之间。方法应用于钨矿石标准物质（GBW 07240,GBW07241）的分析,测定值与认定值相符,测定值的相对标准偏差（n=12）在0.48%~5.1%之间。
The tungsten ore sample was fused with a mixture of sodium peroxide and sodium hydroxide, and the melt was dissolved with a mixture of tartaric acid and hydrochloric acid. ICP-AES was applied to the determination of the 7 elements in the sample solution. Analytical spectral lines of 251.61, 259.94, 396.15, 334.94, 239.71, 202.03, 189.98 nm were chosen for the determination of Si, Fe, Al, Ti, W, Mo and Sn respectively. Linear relationships between values of spectral intensity of corresponding elements and mass concentration of the 7 components were kept in definite ranges. Detection limits （3s） found were ranged from 0.000 24 to 0.063 mg·g^-1. The proposed method was applied to the analysis of CRMs of tungsten ores （GBW 07240, GBW 07241）, giving results in consistency with the certified values and RSD′s （n=12） found were in the range of 0.48%-5.1%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2016年第10期1237-1240,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
