同时多元素萃取-原子吸收光谱法测定锂、硼、钾等无机盐中钙、镁、锰、铜、锌、镉、铁、钴、镍和铅

Simultaneous Determination Calcium,Magnesium,Manganese,Copper,Zinc,Cadmium,Cobalt,Nickel,Lead and Iron in Lithium Salts and Inorganic Salts by Atomic Absorption Spectrometry

本文系用1-苯基-3-甲基-4-苯甲醯基吡唑啉酮-5(PMBP)/甲基异丁基甲酮(MIBK)在六次甲基四胺存在下(pH=8.9)萃取预浓缩以后,用1.5mol/LHCl-2mgLa^(3+)/ml-0.5mgNa^+/ml 进行反萃取,继用原子吸收法在 Li_2CO_3、LiBr、RbCl、Cs_2SO_4、KOH、H_3BO_3、K_2SO_4、NaNO_3、NH_4Cl、NaCl、KH_2PO_4等盐类中测定有机相中的铁,反萃液测定其它9个离子。大量的 Cl^-、NO^-_3、SO^(2-)_4、Li、Rb、Cs、B、PO^(3-)_4等没有干扰。

Trace amounts of Ca,Mg,Mn,Cu,Zn,Cd,Fe,Co,Ni and Pb in some salts,such as LiCl,LiBr,Li_2CO_3,RbCl,CsCl,H_3BO_3,HOH,K_2SO_4,NaCl,KCl, NH_4Cl,have been determined by flame atomic absorption spectrometry,after the extraction of the title trace elements with 1-phenyl-3-methyl-4-benzoylphrazolone-5 in the presence ketone at pH 8.9.Optimum conditions were established and the influence of Li on the dete- rmination was studied.The large amount of Li,Rb,Cs,B,K,Na,Cs,NO_3^-,SO_4^(2-),etc. does not interfere with the title elements.The recovery rate is 94～106%.The detection limit is 1×10^(-4)%.