荷移分光光度法测定双酚S的研究

摘要

Based on the charge-transfer reaction between bisphenol-S (BPS) and borax,a simple and rapid method was developed for the determination of BPS by ultraviolet spectrophotometric method.The results indicated that in water medium,BPS could form charge-transfer complex with borax,and its maximum absorption wavelength was 291 nm.The apparent molar absorptivity was 1.92 × 104 L · mol-1 · cm-1 Beer's law was obeyed for BPS in the concentration range of 0.7-7 mg/L.The correlation coefficient was 0.999 6,and the detection limit was 0.195 μg/mL.The proposed method was applied in the determination of BPS in samples with satisfactory results.The recoveries for BPS were in the range of 99.8％-100.4％ with RSDs(n=5) not more than 0.5％.%该文研究了电子供体硼砂与双酚S荷移络合物的光谱性质,建立了简单快速测定双酚S(BPS)含量的荷移紫外分光光度法.结果表明:荷移络合物的最大吸收波长为291 nm,表观摩尔吸光系数ε为1.92 ×104 L·mol-1·cm-1.双酚S的质量浓度在0.7 ～7 mg/L范围内符合比尔定律,相关系数为0.999 6,检出限为0.195 mg/L.该方法用于测定塑料中双酚S的含量,加标回收率为99.8％ ～ 100.4％,相对标准偏差不大于0.5％.