【摘要】 在1 mol/L的NH3.H2O-NH4Cl缓冲溶液(pH10.0)中,铬(VI)离子和甲基橙分别于-0.34 V和-0.59 V(vs S.C.E)时出现两个灵敏的极谱峰,且峰电流Ip与Cr(VI)和甲基橙在0~8.0×10-5g/L范围内呈良好的线性关系,其相关系数分别为0.999 1和0.992 8;对铬(VI)和甲基橙的检测限分别为9.46×10-8g/L和1.86×10-6g/L,相对标准偏差为2.18%和4.98%;用于测定实际废水中的铬(VI)和甲基橙,结果令人满意。更多还原

【Abstract】 Chromium and methyl orange exhibit two sensitive oscillopolarograghic waves at-0.34V and-0.59V(vs S.C.E)respectively in buffer solution of 1mol/L NH3·H2O-NH4Cl(pH=10.0).And there is a good linear relationship between the peak of current Ip and the mass concentration of Cr(VI)and methyl orange when they were within the range of 0～8.0×10-5 g/L,the correlation coefficient of which were 0.9991and 0.9928,the detection limit of chromium and methyl orange concentration were 9.46×10-8 g/L and 1.86×10-6 g/L respectively,and the relative standard deviation was 2.18% and 4.98%.This method was applied successfully to simultaneous determination of chromium and methyl orange in testing wastewater.更多还原