离子色谱－电感耦合等离子体质谱法联用测定饮料中的溴形态.pdf

226 2010, Vol. 31, No. 12 食品科学 ※分析检测 1 2 3 林 立 ，陈玉红 ，王海波 (1. 国家食品质量安全监督检验中心，北京 100094 ；2.安捷伦科技( 中国)有限公司，北京 100102 ； 3.戴安( 中国)有限公司应用研究中心，北京 100083) ：建立离子色谱(IC)进行分离、电感耦合等离子体质谱仪(ICP-MS)作为检测器测定饮料中溴酸根与溴离子的 方法。溴酸根与溴离子的检出限分别为0.1 μg/L 和0.2 μg/L 。根据加标回收的方法评价该方法的准确性，溴酸根的 加标回收率为88.1%～106.4%，相对标准偏差为1.52%～3.83%(n=6) 。根据所建立的方法，分析市售部分饮料中溴 酸根的含量，其中溴酸根均未检出。 ：I C - I C P - M S ；饮料；溴酸根；溴离子 Determination of Existing Forms of Bromine in Beverage by IC-ICP-MS 1 2 3 LIN Li ， CHEN Yu-hong ，WANG Hai-bo (1. China National Food and Safety Supervision and Inspection Center, Beijing 100094, China ； 2. Agilent Technologies (China) Co. Ltd., Beijing 100102, China ； 3. Application Research Center, Dionex China Co. Ltd., Beijing 100083, China) Abstract ：In this study, we presented a method based on ion chromatographic separation and ICP-MS detection for the － － determination of two existing forms of bromine in beverage, i.e., BrO3 and Br . The limits of detection of the presented method － － were 0.1 μg/L for BrO3 and 0.2 μg/L for Br . Spike recovery tests were carried out to evaluate the accuracy and precision of this method, and average recoveries for BrO3－ in 3 different matrices spiked at 3 levels ranged from 88.1% to 106.4%, with a relative standard deviation from 1.52% to 3.83% (n = 6). This method was used to analyze some commercial beverages, and no BrO3 － was detected in any of them. Key words ：IC-ICP-MS ；beverage ；bromate ion ；bro