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目的:通过分析2018年江西省各级碘缺乏病（IDD）实验室外质控考核结果，总结各级实验室检测的整体水平和检测能力，为IDD监测和防治提供可靠的质量保障。方法:2018年，对江西省的省、市、县3级IDD实验室进行盐碘、尿碘和水碘外质控考核。其中，参加盐碘考核的有1个省级、11个地市级、30个县级实验室；参加尿碘考核的有1个省级、11个地市级、100个县级实验室；参加水碘考核的有1个省级、11个地市级实验室。盐碘测定采用直接滴定法（GB/T 13025.7-2012）；尿碘测定采用砷铈催化分光光度法（WS/T 107.1-2016）或电感耦合等离子体质谱法（WS/T 107.2-2016）；水碘测定采用国家IDD参照实验室推荐的“适合缺碘及高碘地区水碘检测的方法研究”中0 ~ 100 μg/L范围的测定方法。尿碘采用Z比评分法进行判定，当│Z│≤2时，合格；当2 <│Z│ < 3时，基本合格；当│Z│≥3时，不合格。水碘和盐碘采用参考值±不确定度的方法进行判定，检测结果的平均值在此范围内，判定为合格，反之判定为不合格。结果:2018年江西省1个省级和11个地市级IDD实验室盐碘、尿碘和水碘考核的反馈率和合格率均为100.00%。参加盐碘考核的30个县级实验室，有1个不合格；参加尿碘考核的100个县级实验室，有3个不合格。结论:2018年江西省IDD实验室检测技术继续保持在较高水平，部分县级实验室检测能力需要进一步提高。“,”Objective:To analyze the results of external quality control network of iodine deficiency disorders (IDD) laboratories in Jiangxi Province in 2018, to summarize the total detection level and capability at all levels, and to provide reliable quality assurance for monitoring and prevention of IDD.Methods:In 2018, IDD laboratories of provincial, municipal and county-level in Jiangxi Province were examined for the external quality control of salt iodine, urinary iodine and water iodine. Among them, there were 1 provincial, 11 municipal and 30 county-level laboratories participated in salt iodine assessment; there were 1 provincial, 11 municipal and 100 county-level laboratories participated in urinary iodine assessment; and there were 1 provincial and 11 municipal laboratories participated in water iodine assessment. Salt iodine was determined by direct titration method (GB/T 13025.7-2012); urinary iodine was determined by Asn 3+-Cen 4+ catalytic spectrophotometry method (WS/T 107.1-2016) or inductively coupled plasma mass spectrometry method (WS/T 107.2-2016); water iodine was determined by the method in the range of 0 - 100 μg/L in “Study on the Method Suitable for the Detection of Water Iodine in Areas with Iodine Deficiency and High Iodine” recommended by national IDD reference laboratory. Urinary iodine was determined with Z score method, when│Z│≤ 2, it was qualified; when 2 <│Z│ < 3, it was basically qualified; when│Z│≥ 3, it was not qualified. Water iodine and salt iodine were determined by the method of reference value ± uncertainty, and the average value of the test results within this range was judged to be qualified; otherwise, it was judged to be unqualified.n Results:In 2018, the feedback rates and qualified rates of salt iodine, urinary iodine and water iodine in 1 provincial and 11 municipal laboratories in Jiangxi Province were all 100.00%. Thirty county-level laboratories participated in the salt iodine assessment, and 1 of them failed. One hundred county-level laboratories participated in the urinary iodine assessment, and 3 of them failed.Conclusion:Laboratory testing technology of IDD continues to maintain at a high level in Jiangxi Province in 2018, and the detection ability of some county-level laboratories needs to be further improved.