Electrochemical Behavior of 6-Mercapto-Purine at Hanging Copper Amalgam Dropping Electrode and Its Trace Determination by Differential Pulse Adsorption Cathodic Stripping Voltammetry
作者:
Hai-Ying Gu,
Deng-Ming Sun,
Ai-Min Yu,
Hong-Yuan Chen,
期刊:
Analytical Letters
(Taylor Available online 1996)
卷期:
Volume 29,
issue 15
页码: 2743-2753
ISSN:0003-2719
年代: 1996
DOI:10.1080/00032719608002277
出版商: Taylor & Francis Group
关键词: 6-Mercaptopurine;hanging copper amalgam electrode;differential pulse;cathodic stripping;voltammetry
数据来源: Taylor
摘要:
The electrochemical behavior of 6-MP was studied by cyclic voltammetry at a hanging copper amalgam dropping electrode (HCADE). It was found that 6-MP could form a complex with the Cu(II) stripped from the HCADE, showing a new peak at −0.19V in the medium of 0.1mol/L LiClO4-0.5mol/L HClO4solution. The mechanism of the reaction was proposed. This new peak was sensitive and could be used for the determination of trace 6-MP by differential pulse adsorption cathodic stripping voltammetry (DPAdCSV). The linear range was from 3.6×10−10to 5.3×10−6mol/L, and the detection limit was about 1.2×10−10mol/L (S/N=3). The method was also successfully applied to the determination of 6-MP in pharmaceutical tablets.
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