【摘要】 讨论了在 9mol/LHCl5ml,1mg/ml金溶液 0 5ml,加水稀释至 2 0ml的底液中 ,采用标准加入法进行脱砷剂中砷容量的电位溶出分析。实验表明 ,峰电位Ep在 +0 2 2V(饱和甘汞电极为参比电极 )左右砷有一灵敏的一阶导数峰 ,该峰峰高Hp与砷的质量浓度在 0 2～ 2 5 μg /ml之间有较好的线性关系。可对试样进行准确测定。更多还原

【Abstract】 This paper discusses the determination of arsenic content in de-arsenic absorbent by the method of potential stripping analysis(PSA).Arsenic deposited on the working electrode(Gold-film electrode)was oxidized by Au 3+ which is contained in a base liquid composed of 5 ml HCl and 0 5 ml Au(1 mg/ml)diluted to 20 ml.There is a sensitive one-step derivative peak of As at E p(the peak potential)= +0 22 V.A good linear connection exists between the height of this peak( H p)and the concentration of arsenic when the latter is between 0 2 μg/ml to 2 5 μg/ml.Precision of the proposed method was good(RSD,2%),and the percent recovered ranged from 96%～105%.更多还原