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首页> 外文期刊>Mikrochimica Acta: An International Journal for Physical and Chemical Methods of Analysis >Determination of Cd, Co, Cr, Cu, Fe, Mn, Ni and Pb In Natural Waters, Alkali and Alkaline Earth Salts by Electrothermal Atomic Absorption Spectrometry After Preconcentration by Column Solid Phase Extraction
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Determination of Cd, Co, Cr, Cu, Fe, Mn, Ni and Pb In Natural Waters, Alkali and Alkaline Earth Salts by Electrothermal Atomic Absorption Spectrometry After Preconcentration by Column Solid Phase Extraction

机译：柱固相萃取预富集-电热原子吸收法测定天然水，碱金属和碱土金属盐中的镉，钴，铬，铜，铁，锰，镍和铅

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摘要

Methods are described for the determination of trace and ultra trace amounts of Cd, Co, Cr, Cu, Fe, Mn, Ni and Pb in natural waters, alkali and alkaline earth salts. Separation and preconcentration of trace metals is achieved by a column solid phase extraction procedure using silica gel modified with derivatives of dithiocarbamates - Na-DDTC (sodium diethyldithiocarbamate and HMDTC (ammonium hexamethylene-dithiocarbamate) as column packing material. The influence of the sorbent preparation procedure on the degree of sorption of the trace analytes is examined for different pH values of the sample solution. Isobutylmethyl ketone (IBMK) is proposed as an effective eluent for quantitative elution of retained metal ions, Optimal instrumental parameters for ETAAS determination of preconcentrated elements in organic eluate are presented. Practical application of sorbents in analysis of natural waters and alkali and alkaline earth salts is demonstrated. Proposed preconcentration procedure combined with ETAAS determination of trace analytes allows the determination of 0.04 #mu#g 1~(-1) Cd, 0.1 #mu#g~(-1) Cr, Cu, and Mn and 0.3 #mu#g~(-1) Co, Fe, Ni and Pb in natural waters and 1.10 ~(-7)% Cd, 3.10~(-7)% Cr and Mn, 7.10~(-7)% Co, Ni and Pb and 2.10~(-6)% Cu and Fe in alkali and alkaline earth salts.
机译：描述了测定天然水，碱金属和碱土金属盐中痕量和痕量Cd，Co，Cr，Cu，Fe，Mn，Ni和Pb的方法。痕量金属的分离和预富集是通过使用二硫代氨基甲酸酯的衍生物-Na-DDTC（二乙基二硫代氨基甲酸钠）和HMDTC（六亚甲基-二硫代氨基甲酸铵）衍生物改性的硅胶通过柱固相萃取程序实现的，吸附剂制备程序的影响在样品溶液的不同pH值下，对痕量分析物的吸附度进行了研究，提出了异丁基甲基酮（IBMK）作为有效洗脱剂用于定量洗脱残留金属离子的方法，ETAAS测定有机物中预浓缩元素的最佳仪器参数提出了洗脱液，证明了吸附剂在天然水和碱土金属盐和碱土金属盐分析中的实际应用拟议的预浓缩方法与ETAAS结合测定痕量分析物可以测定0.04＃mu＃g 1〜（-1）Cd，0.1 ＃mu＃g〜（-1）Cr，Cu和Mn和0.3＃mu＃g〜（-1）Co，Fe，Ni和Pb i n天然水和碱中的1.10〜（-7）％Cd，3.10〜（-7）％Cr和Mn，7.10〜（-7）％Co，Ni和Pb以及2.10〜（-6）％的Cu和Fe碱土金属盐。

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