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采用流动注射在线分离和电感耦合等离子体原子发射光谱法联用同时测定皮革中Cr(Ⅲ)和Cr(Ⅵ)的迁移量,通过交联淀粉微球分离柱,分离Cr(Ⅲ)和Cr(Ⅵ)并去除其他离子干扰,线性在0.1 mg/L~20 mg/L范围内。该方法精密度高,相对标准偏差为2.1%~3.7%,检出限为5μg/L,样品分析速度为30样/h。与传统的分光光度法相比,可以避免繁琐的样品处理,克服色度的干扰,具有灵敏度高,重现性好的特点,可满足测定皮革中Cr(Ⅲ)和Cr(Ⅵ)的检测要求。
The migration of Cr (Ⅲ) and Cr (Ⅵ) in leather was measured simultaneously by flow injection on-line separation and inductively coupled plasma atomic emission spectrometry. The cross-linked starch microspheres separation column was used to separate Cr (Ⅲ) and Cr Ⅵ) and remove the interference of other ions, linearity in the range of 0.1 mg / L ~ 20 mg / L. The method has high precision, relative standard deviation of 2.1% ~ 3.7%, detection limit of 5μg / L, sample analysis speed of 30 samples / h. Compared with the traditional spectrophotometry, it can avoid cumbersome sample processing, overcome the interference of chromaticity, has the characteristics of high sensitivity and good reproducibility, and can meet the detection requirements of Cr (Ⅲ) and Cr (Ⅵ) in leather.