A method for simultaneous determination of nine cations including Fe 3+, Cu 2+, Ni 2+, Zn 2+, Co 2+, Fe 2+, Cd 2+, Mg 2+ and Ca 2+ by single-column ion chromatography with a conductivity detector was developed. The op...A method for simultaneous determination of nine cations including Fe 3+, Cu 2+, Ni 2+, Zn 2+, Co 2+, Fe 2+, Cd 2+, Mg 2+ and Ca 2+ by single-column ion chromatography with a conductivity detector was developed. The optimum composition of eluent was 6 mmol/L malic acid and 3 mmol/L ethylenediamine(pH=4 0). The effects of malic acid concentration, ethylenediamine concentration and pH value on retention time were studied in details. The method was used to determine Fe, Cu, Zn, Mg and Ca in whole blood and serum with satisfactory results.展开更多
硬度是指水中二价及多价金属离子含量的总和,其中构成天然水硬度的主要离子是Ca2＋和Mg2＋。因此,一般都以Ca2＋和Mg2＋离子含量为计算硬度。水的硬度采用两种方法表示：一是以度计：以每升水含10mg Ca O为1度,也称德国度;二是用Ca CO3...硬度是指水中二价及多价金属离子含量的总和,其中构成天然水硬度的主要离子是Ca2＋和Mg2＋。因此,一般都以Ca2＋和Mg2＋离子含量为计算硬度。水的硬度采用两种方法表示：一是以度计：以每升水含10mg Ca O为1度,也称德国度;二是用Ca CO3含量表示单位mg/L。展开更多
文摘A method for simultaneous determination of nine cations including Fe 3+, Cu 2+, Ni 2+, Zn 2+, Co 2+, Fe 2+, Cd 2+, Mg 2+ and Ca 2+ by single-column ion chromatography with a conductivity detector was developed. The optimum composition of eluent was 6 mmol/L malic acid and 3 mmol/L ethylenediamine(pH=4 0). The effects of malic acid concentration, ethylenediamine concentration and pH value on retention time were studied in details. The method was used to determine Fe, Cu, Zn, Mg and Ca in whole blood and serum with satisfactory results.
