Rezaei Behzad, Keyvanfard Mohsen
Department of Chemistry, Isfahan University of Technology, Isfahan 84156-84111, Islamic Republic of Iran.
J Hazard Mater. 2008 Mar 1;151(2-3):456-60. doi: 10.1016/j.jhazmat.2007.06.012. Epub 2007 Jun 12.
In this work, a simple, selective and rapid flow injection method has been developed for determination of ruthenium. The method is based on its catalytic effect on the oxidation of safranin-O by metaperiodate. The reaction was monitored spectrophotometrically by measuring safranin-O absorbance at lambdamax=521. The reagents and manifold variables, which have influences on the sensitivity, were investigated and the optimum conditions were established. The optimized conditions made it possible to determine ruthenium in the ranges of 0.4-20.0 ng/mL (DeltaA=0.2819CRu+1.1840) and 20.0-100.0 ng/mL (DeltaA=0.0984CRu+7.9391) with a detection limit of 0.095 ng/mL and a sample rate of 30+/-5 samples/h. Relative standard deviation for the five replicate measurements was less than 1.84%. The proposed method has been successfully applied for analysis of ultra trace amounts of ruthenium in real samples.
在本工作中，已开发出一种简单、选择性好且快速的流动注射法用于测定钌。该方法基于钌对偏高碘酸盐氧化番红O的催化作用。通过在λmax = 521处测量番红O的吸光度，以分光光度法监测该反应。研究了对灵敏度有影响的试剂和流路变量，并确定了最佳条件。优化后的条件使得能够在0.4 - 20.0 ng/mL（ΔA = 0.2819CRu + 1.1840）和20.0 - 100.0 ng/mL（ΔA = 0.0984CRu + 7.9391）范围内测定钌，检测限为0.095 ng/mL，进样速率为30 ± 5个样品/小时。五次重复测量的相对标准偏差小于1.84%。所提出的方法已成功应用于实际样品中超痕量钌的分析。
