Voltammetry determination of trace manganese with pretreatment glassy carbon electrode by linear sweep voltammetry
Voltammetry determination of trace manganese with pretreatment glassy carbon electrode by linear sweep voltammetry
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DOI：
10.1016/s0039-9140(03)00062-6
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发表时间：
2003-05-28
期刊：
影响因子：
6.1
通讯作者：
Zhang, F
中科院分区：
文献类型：
--
作者：
Di, JW;Zhang, F
本文研究了在预处理玻碳电极上线性扫描伏安法测定痕量锰。用0.1mol·l ~（-1）NaOH溶液对玻碳电极进行电化学预处理，大大提高了测定锰的电极响应性。利用预先沉积在电极上的锰氧化物的自催化作用，克服了低浓度锰的检测障碍。在最佳实验条件下（0.04 mol l（-1）NH_3-NH_4Cl缓冲溶液，pH9.0），线性扫描伏安法的线性范围为4 × 10 ~（-8）~ 1 × 10 ~（-6）mol l（-1）Mn（II），卷积伏安法的线性范围为1 × 10 ~（-9）~ 4 × 10 ~（-8）mol l（-1）Mn（II）。2 × 10 ~（-8）mol·l ~（-1）Mn（Ⅱ）的相对标准偏差为3.4%。该方法简便、快速、灵敏、选择性好。用于样品中痕量锰的测定，结果满意。(C)2003 Elsevier Science B. V.保留所有权利。
This paper described the determination of trace manganese using linear sweep voltammetry at a pretreatment glassy carbon electrode. The glassy carbon electrode pretreated by electrochemical method in the 0.1 mol l(-1) NaOH solution greatly improved the electrode responsibility in the determination of manganese(II). The barrier to the detection of low manganese concentration was overcome by means of autocatalytic effect of manganese oxide deposited on the electrode in advance. Under the optimum experiments condition (0.04 mol l(-1) NH3-NH4Cl buffer solution, pH 9.0), the linear range was 4 x 10(-8) to 1 x 10(-6) mol l(-1) Mn(II) for linear sweep voltammetry and 1 x 10(-9) to 4 x 10(-8) mol l(-1) Mn(II) for convolution voltammetry. The relative standard deviation for 2 x 10(-8) mol l(-1) Mn(II) is 3.4%. The proposed method is simple, rapid, sensitive and selective. It had been applied to the determination of trace manganese in samples with satisfactory results. (C) 2003 Elsevier Science B.V. All rights reserved.