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作者基于在结晶紫(CV)——烷基苯磺酸盐(ABS)复合体溶液中浸入聚氯乙烯(PVC)薄片时,该薄片可吸附此复合体而染成紫色的现象,提出了水中微量ABS的简易定量方法。此法简单易行,对ABS选择性好,共存盐类影响小,颜色在暗处可稳定一周。测定范围目视比色为0.2～5 ppm,吸光度测定为0.2～10 ppm。PVC薄片着色强度受PVC中增塑剂含量影响很大,硬质PVC完全不着色。作者考察了不同pH值、PVC薄片浸入时间、样品
Based on the phenomenon that when the sheet is immersed in a polyvinyl chloride (PVC) sheet in a solution of crystal violet (CV) -alkylbenzene sulfonate (ABS), the sheet can absorb the complex and become purple, Trace amount of ABS simple quantitative method. This method is simple, good selectivity to ABS, salt coexistence little effect, the color can be stable in the dark week. Measurement range Visual colorimetric 0.2 ~ 5 ppm, absorbance was measured as 0.2 ~ 10 ppm. PVC sheet coloring strength PVC plasticizer content greatly affected, hard PVC completely colored. The authors examined the different pH, PVC sheet immersion time, samples