离子色谱法分析痕量卤离子,一般用电导或安培检测器检测。在阴离子色谱分离中,因氯离子在溴离子前被冼脱,当用电导检测含较高浓度氯离子样品中痕量溴、碘离子时,很宽的氯峰会干扰后面溴峰的定量效果。消除氯离子干扰常用的方法是稀释,但稀释后样品中低含量组分往往就无法测出。本文用日本岛津UV-365型紫外分光光度计,研究了氯、溴、碘三种离子的紫外吸收特性。利用氯离子在紫外区仅有极弱的吸收,而溴、碘离子具 Ion chromatography trace halide, usually with conductivity or amperometric detector detection. In anion chromatographic separations, a wide range of chlorine peaks interfere with the quantification of the bromine peak behind when traces of bromine and iodine ions are detected by conductivity in chloride ion samples because chloride ions are desorbed before bromide ions. The common method of eliminating chloride interference is dilution, but the low content of the diluted sample often can not be measured. In this paper, Japan Shimadzu UV-365 UV spectrophotometer, the chlorine, bromine, iodine three kinds of ions UV absorption characteristics. Use of chloride ions in the ultraviolet region is only very weak absorption, while bromine, iodine ion with