ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method for isotope tracing of bioavailability of heavy metal in sediment

An ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method for isotope tracing of bioavailability of heavy metals in sediments relates to the technical field of heavy metal detection, and comprises the following steps: (1) determination of the total amount of heavy metals in the sediments, (2) isotope labeling tracing: synthesizing ion exchange state lead (206Pb exists in the form of lead nitrate) in the sediments labeled by different lead isotopes, and adding the lead into the sediments; (3) bio-availability extraction: adding the sediment sample into a bovine serum albumin solution, oscillating and extracting; and (4) determining the heavy metal content and the isotope content in the bovine serum albumin by using ICP-MS. 一种同位素示踪沉积物重金属生物可利用性的ICP-MS法，涉及重金属检测技术领域，其包括如下步骤：(1)沉积物重金属总量的测定，(2)同位素标记示踪：通过合成不同铅同位素标记的沉积物中离子交换态铅(206Pb，以硝酸铅形式存在)，将其添加到沉积物中；(3)生物可利用性提取：将沉积物样品用加入牛血清白蛋白溶液，震荡、萃取；(4)用ICP-MS测定牛血清白蛋白中重金属含量和同位素含量。