【摘要】 <正> 用二乙铵-N,-N＇-二乙基二硫氨基酸脂DEDTC/MIBK在醋酸缓冲液（pH:4.65）萃取体系萃取富集,以火焰原子吸收法测定LiCl、NaCl、KCl、RbCl、CsCl、CaO、MgCl₂中痕量的铜、锌、镉,铁、钴、镍、铅。研究了基体对萃取及测定的影响和络合物在有机相和水相中的稳定时间等作了探讨。本法可测定1.10^-4～10（-5）痕量元素,有较高的精密度和准确度（相对标准偏差为5％）。更多还原

【Abstract】 Trace content of Cu, Zn, Cd, Fe, Co, Ni, Pb in LiCl, RbCl, NaCl, KCl, CaO and MgCl₂ is determined by flame atomic absorption spectrometry after preceding preconcentration using the extraction system diethylammonium-N, N＇-diethyldithiocarbamate/MIBK. The effect of the salt matrix on the extraction and determination of those trace elements and the stabilized time of the extractive process was investigated. The method permits the trace determination in the concentration range of 10^-4—^-5% with good precision and accuracy（variation coefficient 5%）.更多还原