在碱性条件下,双酚S紫外吸收光谱的最强吸收峰发生红移,从257 nm移至293 nm,据此建立了简单、灵敏、快捷、选择性较好的测定双酚S的紫外分光光度法.研究了氨水用量、反应时间,反应温度的影响.结果表明:双酚S的最大吸收波长为293 nm,线性范围是0.6 mg/L~7.2 mg/L,相关系数r为0.997 3.这种方法简单快速,结果稳定准确,为塑料制品中双酚S的残留检测提供了新的试验方法.%Under alkaline conditions, the UV-Vis maximum absorption of bisphenol S exhibited bathochromic shift from 257 nm to 293 nm. Based on which, a simpler, quicker, more sensitive and more selective UV-spectrophotometric method to determine bisphenol S was established. The effects of the amount of ammonia water, reaction time, reaction temperature were investigated. The analysis showed that the maximum absorption wavelength of bisphenol S was 293 nm, the linear range was 0.6 mg/L-7.2 mg/L, and the correlation coefficients r was 0.997 3. The determination method was simple and rapid , and the results were accurate and stable as well, hence a new method for bisphenol S residues determination was provided in plastic products.
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