摘要
目的:建立一种用碱超声提取-ICP-MS高效测定水产品中碘含量的方法。方法:样品经5%四甲基氢氧化铵(TMAH)超声提取3 h,通过ICP-MS,以Te为内标,对样品溶液进行测定。结果:在最优的前处理方法和仪器条件下,碘在质量浓度为0~20μg·L^(-1)时线性关系良好,相关系数R=1.0000,平均回收率为90.3%~96.9%,标准物质验证结果均在范围内。结论:该方法准确率高、简单可靠、线性关系好、检出限低,适用于各类水产品中碘含量的测定。
Objective:To establish a method for the determination of iodine in aquatic products by alkaline ultrasonic extraction-ICP-MS.Method:The sample was extracted by 5%tetramethylammonium hydroxide(TMAH)for 3 hours,and the sample solution was determined by ICP-MS with Te as the internal standard.Result:Under the optimal pretreatment method and instrument conditions,the mass concentration of iodine was 0~20μg·L^(-1),the linear relationship is good,the correlation coefficient R=1.0000,the average recovery rate is 90.3%~96.9%,and the validation results of the reference materials are within the range.Conclusion:The method has high accuracy,simple and reliable,good linear relationship and low detection limit,and is suitable for the determination of iodine content in various aquatic products.
作者
林敦尖
吴雅芝
王志雄
梁培烁
LIN Dunjian;WU Yazhi;WANG Zhixiong;LIANG Peishuo(Guangdong Testing Institue of Product Quality Supervision,Foshan 528300,China)
出处
《食品安全导刊》
2023年第13期105-107,共3页
China Food Safety Magazine
