摘要:
本文试验了多种氧化荆对用原子吸收光谱法测定钌的影响。结果表明,在三氯化钌溶液中分别加入NaBiO3,(NH4)2S2O8,KIO4,KBrO3,Ce(SO4)2,Ce(SO4)2+KBrO3等试剂,能使测定钌的灵敏度分别提高10,17,19,19,23,37倍,方法的灵敏度(特征浓度)为0.051μg/ml,检出限为0.02μg/ml,测量1.0和0.5μg/ml钌溶液10次,变异系数分别为1.2%和2.1%.水中含有50mg/ml K+,SO42-,10mg/ml Na+,Ca2+,Mg2+,1mg/mlCl-不影响钌的测定.探讨了氧化剂的作用机理.本法适于水中痕量钌的测定.
Abstract:
The effects of a number of oxidants on the sensitivity of ruthenium were examined. The results show that the sensitivity of ruthenium increased. 10,17, 19, 19, 23 and 37 times after adding NaBiO3,(NH4)2S2O8,KIO4,KBrO3,Ce(SO4)2, and Ce(SO4)2+KBrO3 to ruthenium trichloride solution, respectively. The characteristic concentration of ruthenium is 0.051μg/ml, and the detection limit is 0.02μg/ml. The coefficients of variation for ten measurements of 0.5 and 1.0μg/ml Ru were 1.2 and 2.1%, respectively. No interference was observed in the presence of 50mg/ml K+, SO42-, 10 mg/ml Na+, Ca2+, Mg2+ and lmg/ml Cl-. The mechanism of the action of oxidant is investigated. Trace ruthenium in river water has been determined with satisfactory results.
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