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Application of stripping voltammetry method for the analysis of available copper, zinc and manganese contents in soil samples

机译:溶出伏安法在土壤样品中有效铜,锌和锰含量分析中的应用

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摘要

Determination of copper (Cu), zinc (Zn) and manganese (Mn) micronutrients in soil samples have been studied for an efficient fertiliser application. Plant-available micronutrients of soils were extracted with DTPA extraction procedure, then differential pulse stripping voltammetry (DPSV) and square wave stripping voltammetry (SWSV) methods were performed with inexpensive and disposable pencil graphite electrode for determination of Cu(II), Zn(II) and Mn(II). Parameters such as deposition potential, deposition time, pH and concentration of the supporting electrolyte were optimised for these ions. Under optimised conditions, the limits of detection were found as 0.01mg L-1 for Cu(II) and 0.02mg L-1 for Zn(II) and 0.25mg L-1 for Mn(II). Relative standard deviation (%RSD) was 6.80, 8.86 and 3.29 for Cu(II), Zn(II) and Mn(II), respectively. The experimental study was conducted using a flame atomic absorption spectroscopy. The described stripping voltammetry methods were successfully applied for the determination of Mn(II), Cu(II) and Zn(II) in soil samples.
机译:为了有效地施肥,已经研究了测定土壤样品中铜(Cu),锌(Zn)和锰(Mn)微量营养元素的方法。用DTPA提取程序提取土壤中可利用的土壤微量营养素,然后使用廉价的一次性铅笔石墨电极进行微分脉冲溶出伏安法(DPSV)和方波溶出伏安法(SWSV)方法,用于测定Cu(II),Zn(II) )和Mn(II)。针对这些离子优化了诸如沉积电位,沉积时间,pH和支持电解质浓度之类的参数。在优化的条件下,检出限为:Cu(II)为0.01mg L-1,Zn(II)为0.02mg L-1,Mn(II)为0.25mg L-1。 Cu(II),Zn(II)和Mn(II)的相对标准偏差(%RSD)分别为6.80、8.86和3.29。使用火焰原子吸收光谱法进行了实验研究。所描述的溶出伏安法已成功地用于测定土壤样品中的Mn(II),Cu(II)和Zn(II)。

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