Catalytic Spectrophotometric Determination of an Ultra-Trace Amount of Lead by Reduction of Resazurin by Sodium Sulfide
Catalytic Spectrophotometric Determination of an Ultra-Trace Amount of Lead by Reduction of Resazurin by Sodium Sulfide
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DOI：
10.1080/00032719108053000
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发表时间：
1991-09
影响因子：
2
通讯作者：
A. Afkhami;A. Safavi;A. Massoumi
中科院分区：
文献类型：
--
作者：
A. Afkhami;A. Safavi;A. Massoumi
本文研究了动力学光度法测定超痕量铅（II）的方法。该方法基于该离子对硫化物还原刃天青的催化作用。化学反应的过程通过在605 nm处测量刃天青的吸光度的降低来进行。Pb（II）的校准范围取决于硫化物浓度。用这种方法可以检测到1 ng m1−1铅。该方法用于测定KNO3（Fluka）和水中的Pb（II）。
Abstract A Kinetic spectrophotometric method for the determination of ultra-trace amounts of lead(II) is described. This method is based on the catalytic action of this ion on the reduction of resazurin by sulfide. The course of the chemical reaction is followed spectrophotometrically by the measurement of reduction in absorbance of resazurin at 605 nm. The calibration range of Pb(II) is dependent on the sulfide concentration. With this method 1 ng m1−1 lead can be detected. The method is used for determination of Pb(II) in KNO3 (Fluka) and in water.