摘要
本文在pH为6.0的HAc-NaAc缓冲溶液中,以Pb为共沉淀剂用K_2CrO_4使Ba成BaCrO_4沉淀进行富集,再应用N_2O-C_2H_2火焰原子吸收光谱法测定Ba。方法的特征浓度为0.18μg/ml/1％吸收,标准加入回收率为96—102％。对于含Ba 3.86PPm的岩石样品进行10次测定,其相对标准偏差为0.96％。测定了GSD水系沉积物标样中的Ba,结果与推荐值吻合。
Barium is preconcentrated and separated by coprecipitation with lead as chromate in sodium acetate buffer(pH 6)and determined by AAS in a nitrous oxide-acetylene flame. The interference of aluminum can be eliminated by adding salicylic acid as spectrochemical buffer. This method can be applied to rocks with Ba content ranging from 0.005 to 0.1% with good precision and accuracy.
出处
《岩矿测试》
CAS
CSCD
北大核心
1990年第3期201-203,共3页
Rock and Mineral Analysis
