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本文系用二乙基二硫代氨基甲酸二乙铵(DEDTC)/甲基异丁基甲酮(MIBK)pH5.7萃取体系,预浓缩以后,用原子吸收法在RbCl、 CsCl、 Sr(NO_3)_2、H_3BO_3、NH_4NO_3、NaBr、KI、Li_2CO_3、NaCl、KCl、CaCl_2、MgO、BaCl_2、KH_2pO_4、KNaC_4H_4O_6、C_6H_6O_7等盐类中测定痕量的锰、铬、铜、锌、镉、铁、钴、镍、铅等九个元素,其中应用于前面七个样品是我们提出的。检出限为1×10~(-4)％,九个元素的回收率在93～106％之间,相对标准偏差(n=7)为2.7％。
In this paper, the system was extracted by DEDTC / MIBK pH5.7. After preconcentration, the sample was purified by atomic absorption spectrometry in the presence of RbCl, CsCl, Sr (NO_3) _2 Trace elements such as trace elements manganese, chromium, copper, zinc, cadmium, iron, cobalt, nickel, cobalt and nickel in salts such as H_3BO_3, NH_4NO_3, NaBr, KI, Li_2CO_3, NaCl, KCl, CaCl_2, MgO, BaCl_2, KH_2pO_4, KNaC_4H_4O_6, C_6H_6O_7, Lead and other nine elements, which applied to the first seven samples are we proposed. The detection limit was 1 × 10 ~ (-4)%, the recoveries of nine elements were between 93 ~ 106%, and the relative standard deviations (n = 7) were 2.7%.