摘要
建立了阳极溶出方波伏安法测定水体中铅离子的方法.在p H=2~3,浓度为0.10 mol/L的NH4Cl溶液中,Pb^(2+)于-0.49 V(vs.SCE)产生灵敏的溶出峰,其峰高与离子浓度在0.03~5.0 mg/L范围内,呈良好的线性关系,相关系数R^2=0.9942,线性方程为Y=0.17894X+1.87466,在Pb2+本底值为0.0581 mg/L水体中添加3个水平(0.01、0.02、0.1 mg/L),平均回收率在89.3%~106.5%之间,相对标准偏差(RSD)为3.2%~9.1%(n=6),检出限(LOD)为0.01 mg/L.本方法操作简便、安全、快速、灵敏度高、重现性好,适合于废水、地表水及生活用水中铅的测定.
Abstract： To establish a method for determination of the lead ion content of the water by square wave anodw stripping voltammeter. In solution of 0.10 mol/ L NH4Cl at pH=2-3, sensitive stripping peak of Pb （11） was ob- served. The peak potential of the wave was -0.49 V （vs. SCE）. Measured within the range of 0.03 ～ 5.0 mg/L, the mass concentration of Pb（ Ⅱ ） and peak height showed a good linear relationship （R2≥0.9942）, linear regression equation was Y=0.17894X＋1.87466. The average recovery rates were 89.3% - 106.5%, and relative standard devia- tion （RSDs） were 3.2% -9.1%（n=6）, at the spiked level 0.01, 0.02, 0.1 mg/L, in water which Cu（U） content was 0.0581 mg/L. Limit of qualitative of the method （LOD）was 0.01 mg/L. Results show that the method was convenient operation, high sensitivity, good reproducibility, could meet determination of Pb（ Ⅱ） content in surface water, waste-water and domestic water.
出处
《伊犁师范学院学报（自然科学版）》
2015年第4期39-43,共5页
Journal of Yili Normal University：Natural Science Edition
基金
伊犁师范学院重点科研项目(2013YSZD04)
伊犁师范学院教育教学改革项目(JG201137)
关键词
阳极溶出方波伏安法
玻碳汞膜电极
铅离子
水体
Anodic Stripping Square Wave Vohammetry
Glassy Carbon Mercury Film Electrode
Lead Ion
Water
