电感耦合等离子体质谱(ICP-MS)法测定水产品中锶同位素比值  

Determination of Strontium Isotope Ratio in Aquatic Products by Inductively Coupled Plasma Mass Spectrometry

作　　者：崔艳梅 韩典峰 姜芳 宫向红 徐英江 田秀慧 CUI Yanmei;HAN Dianfeng;JIANG Fang;GONG Xianghong;XU Yingjiang;TIAN Xiuhui(Shandong Marine Resource and Environment Research Institute,Shandong Key Laboratory of Marine Ecological Restoration,Yantai,Shandong 264006,China)

机构地区：[1]山东省海洋资源与环境研究院,山东省海洋生态修复重点实验室,山东烟台264006

出　　处：《中国无机分析化学》2023年第4期382-388,共7页Chinese Journal of Inorganic Analytical Chemistry

基　　金：山东省现代农业产业技术体系项目(SDAIT-26-05,SDAIT-14-08);山东省农业重大应用技术创新项目(SF1805301301);山东省自然科学基金资助项目(ZR2021MD046)。

摘　　要：为推动锶同位素在水产品溯源中的应用,将水产品组织经冻干研磨和微波消解后,用电感耦合等离子体质谱(ICP-MS)法测定样品溶液中的锶同位素比值,并采用标准品-样品-标准品交叉测定方法降低质量歧视效应的影响。结果表明,通过稀释样品消解溶液,将总锶浓度控制在70~100μg/L,并与80μg/L的锶同位素标准品溶液进行交叉测定,可准确校正质量歧视效应;84Sr/86Sr、87Sr/86Sr和88Sr/86Sr的日内精密度分别为0.06%、0.03%和0.03%,日间精密度分别为0.08%、0.04%和0.03%;按照所建立的方法测定大虾和扇贝生物成分分析标准物质中锶同位素比值,84Sr/86Sr、87Sr/86Sr和88Sr/86Sr的相对标准偏差均低于0.1%。建立的方法前处理简单、快捷,并且测定精密度高,可为锶同位素比值测定进一步应用于水产品溯源研究提供技术支撑。In order to promote the application of strontium isotopes in the traceability of aquatic products, the method for the determination of strontium isotope ratio was established based on inductively coupled plasma-mass spectrometry technology(ICP-MS).After freeze-drying and grinding, the tissue was digested by microwave.The strontium isotope ratio was determined by ICP-MS in the sample solution, using standard-sample-standard cross measurement method to reduce the influence of quality discrimination effect.The results showed that 80 μg/L standard for cross measurement can correct the quality discrimination effect accurately when the total strontium concentration between 70—100 μg/L in the sample solution.The intra-day precision was 0.06%,0.03% and 0.03% respectively, and the inter-day precision was 0.08%,0.04% and 0.03% of84Sr/86Sr,87Sr/86Sr and88Sr/86Sr, respectively.The standard substances of prawns and scallops for biological component analysis were determined using the established method, and the relative standard deviations were less than 0.1% of84Sr/86Sr,87Sr/86Sr and88Sr/86Sr.The established method is simple, fast and accurate, which can provide the foundation for the determination and the application of strontium isotope ratio in the traceability of aquatic products.

关 键 词：电感耦合等离子质谱法 锶同位素 水产品 质量歧视效应 溯源 

分 类 号：O657.63[理学—分析化学]