Prasad Surendra, Naik Radhey M, Srivastava Abhishek
School of Chemical Sciences, Faculty of Science and Technology, The University of the South Pacific, Suva, Fiji.
Spectrochim Acta A Mol Biomol Spectrosc. 2008 Oct;70(5):958-65. doi: 10.1016/j.saa.2007.10.011. Epub 2007 Oct 13.
The ruthenium catalyzed oxidation of tris(2-aminoethyl)amine (TREN) by hexacyanoferrate(III) has been utilized for the development of a new and sensitive catalytic kinetic method (CKM) for the determination of ruthenium(III). The reaction was followed spectrophotometrically by the decrease in absorbance at 420 nm (lambda(max) of [Fe(CN)6]3-). The CKM developed utilizes fixed time procedure under optimum reaction conditions where the change in absorbance (DeltaAt) versus ruthenium(III) concentrations is plotted. The calibration curve recommended for the method is linear in the concentration range 10.11-252.67 ng ml(-1) with very good accuracy and reproducibility and a maximum error 2.20%. The detection limits of the method for ruthenium(III) corresponding to 10, 15 and 20 min are 8.02, 5.03 and 3.15 ng ml(-1), respectively. The ruthenium(III) has also been determined in the presence of several other interfering and non-interfering cations and anions and no foreign ions interfered in the determination of ruthenium(III) up to five-fold higher concentration of the foreign ions tested. The method is highly sensitive, selective and stable. It has successfully been applied for the determination of trace ruthenium(III) in some synthetic and environmental water samples. A review of most of the published catalytic kinetic and some other important methods for the determination of ruthenium has also been presented.
利用钌催化六氰合铁（III）氧化三（2-氨乙基）胺（TREN），开发了一种用于测定钌（III）的新型灵敏催化动力学方法（CKM）。通过分光光度法跟踪反应，监测420 nm处吸光度的下降（[Fe(CN)6]3-的最大吸收波长）。所开发的CKM在最佳反应条件下采用固定时间法，绘制吸光度变化（ΔAt）与钌（III）浓度的关系图。该方法推荐的校准曲线在10.11 - 252.67 ng ml(-1)浓度范围内呈线性，具有很高的准确度和重现性，最大误差为2.20%。该方法在10、15和20分钟时对钌（III）的检测限分别为8.02、5.03和3.15 ng ml(-1)。还在几种其他干扰和非干扰阳离子及阴离子存在的情况下测定了钌（III），在所测试的外来离子浓度高达五倍的情况下，没有外来离子干扰钌（III）的测定。该方法具有高灵敏度、选择性和稳定性。它已成功应用于一些合成水样和环境水样中痕量钌（III）的测定。还对大多数已发表的用于测定钌的催化动力学方法和其他一些重要方法进行了综述。
