电镀废液中铁、铜、铬、镍离子的光度法快速分析

Rapid Photometric Analysis of Valuable Metal Ions of Iron,Copper,Chromium,Nickel in Electroplating Wastewater

电镀废水中通常含有Fe,Cu,Cr和Ni金属离子,必须准确测定,加以排除。采用多波长分光光度法,对这4种金属离子同时进行定量分析;确定了测定每一种金属离子的最佳吸收波长,建立了有效的线性方程,并验证了其准确性;考虑到各离子的含量不同,对其测定下限进行了研究,分析了其测定的影响因素。结果表明:Fe,Cu,Cr,Ni的测定下限分别为5×10-4,1×10-3,5×10-3,5×10-3mg/m L。采用本法测定4种金属离子简便、准确。

Fe,Cu,Cr and Ni ions were quantitatively analyzed by multiwavelength spectrophotometry. Every optimum absorb wavelength of metal ion was determined,and the effective linear equations and their accuracy were established and verified. In addition,in consideration of that the content of each metal ion was different,the detection limits and influence factors of determination were studied. Results showed that the detection limits of determination of Fe,Cu,Cr,Ni ions were 5 × 10- 4,1 × 10- 3,5 × 10- 3,5 ×10- 3mg / mL,respectively. For detecting content of those four metal ions,the proposed method was simple and accurate.