摘要：AbstractAn optimization method of chromogenic agent was mainly studied to detect the concentration of metal ions in zinc metallurgy wastewater based on ultraviolet-visible spectrometry. Firstly, a chromogenic agent was selected to reduce the sensitivity of Zn(II) that solved the problem of spectral masking caused by high concentration of Zn(II). However, the range of noiseless wavelength, linearity of Zn(II) and additivity of absorbance were serious influenced by the dosage of chromogenic agent. So, a multi-objective optimization method with the target of maximum range of noiseless wavelength, maximum linearly dependent coefficient of Zn(II) and the optimum additivity of absorbance was proposed to optimize the dosage of chromogenic agent. Finally, the optimization result are verified by feature interval association-partial least squares regression. The average relative errors of Zn(II), Cu(II), Co(II) and Ni(II) were 5.43%, 6.65%, 6.24% and 6.87%, respectively. It indicates that the detection method using optimal chromogenic agent exhibit high-precision and low-error for analyzing the concentration of Zn(II), Cu(II), Co(II) and Ni(II).
关键词：KeywordsUltraviolet-visible spectrometrymulti-objective optimization methodfeature interval association-partial least squares regression
