Determination of Ultratrace Amounts of Ruthenium(III) by the Delayed Autocatalytic Reaction Using Citric Acid
Determination of Ultratrace Amounts of Ruthenium(III) by the Delayed Autocatalytic Reaction Using Citric Acid
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柠檬酸延迟自催化反应测定超痕量钌(III)
DOI：
10.2116/analsci.21.705
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发表时间：
2005
影响因子：
1.6
通讯作者：
S. Igarashi
中科院分区：
文献类型：
--
作者：
Jun Kato;O. Ohno;S. Igarashi
在溴酸钾自催化反应体系中，以铜(II)-3，4‘，4“，4-‴-四磺酸钠为指示剂，建立了测定超痕量Ru(III)的方法。在1×10~(-1)−~5×10~(-1)−~(-12)M范围内，通过时间测量获得了满意的标准曲线，相对标准偏差为2.8%(n=5)。方法检出限(3σ)为3.30×10~(-1)−~(14)M(3.34ppq)。
A method for determination of ultratrace amounts (ppq levels) of ruthenium(III) was developed using a copper(II)- phthalocyanine-3,4′,4″,4‴-tetrasulfonic sodium salt (Cu-PTS) as an indicator in a potassium bromate autocatalytic reaction system. A satisfactory calibration curve of ruthenium(III) ion was obtained by the time measurement in the concentration range of 1 × 10^−13 M to 5 × 10^−12 M with the relative standard deviation (RSD) of 2.8% ( n = 5). The determination limits (3σ) were 3.30 × 10^−14 M (3.34 ppq).