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目的:建立一种快速测定全血碘含量的碱直接稀释-电感耦合等离子体质谱方法。方法:取0.50 ml血样加2%氨水-0.01% Triton X-100溶液定容至10.0 ml，振荡均匀后，以1.0 μg/ml铑和20%异丙醇溶液为在线内标溶液，内标溶液与待测液的流量比为1∶16，采用电感耦合等离子体质谱法进行定量测定，并评价方法的线性范围、检出限、准确度、精密度等。结果:全血碘含量在0~200 μg/L范围内线性关系良好，相关系数（n r）> 0.999。该方法的检出限为0.1 μg/L，定量限为0.3 μg/L，加标回收率范围为88.5%~106.1%，相对标准偏差范围为2.2%~4.7%（n n=7）。n 结论:成功建立快速测定全血碘含量的碱直接稀释-电感耦合等离子体质谱法，方法准确、简单、快速、自动化程度高。“,”Objective:To establish a method for rapid determination of iodine in whole blood by direct alkali dilution inductively coupled plasma mass spectrometry (ICP-MS).Methods:Totally 0.50 ml whole blood sample was collected, and 2% ammonia and 0.01% Triton X-100 solution were added to constitute a total volume of 10.0 ml. After shaking to uniformity, 1.0 μg/ml rhodium and 20% isopropanol were used as on-line internal standard solution. The flow ratio of internal standard solution to the solution to be measured was 1∶16. The sample was quantitatively determined by ICP-MS. The linear range, limit of detection (LOD), accuracy and precision of the method were evaluated.Results:Iodine in whole blood could be determined and had a good linear relationship within the range of 0-200 μg/L, with correlation coefficient ( n r) > 0.999. The LOD of the method was 0.1 μg/L, the limit of quantitation (LOQ) was 0.3 μg/L, the recovery rate of iodine in whole blood was 88.5%-106.1%, and the relative standard deviation was 2.2%-4.7% ( n n=7).n Conclusions:A method for rapid determination of iodine in whole blood by direct alkali dilution ICP-MS is successfully established. This method is accurate, simple, rapid, and highly automatic, and it can be widely applied in determination of iodine in whole blood.