职业与健康 ›› 2026, Vol. 42 ›› Issue (2): 168-172.

• 论著 • 上一篇    下一篇

利用全自动在线消解碘分析仪测定尿中碘含量的方法研究

王春燕1, 杨小媛2(), 曹誉龄1, 杨颖馨1, 王彬1   

  1. 1.成都市锦江区疾病预防控制中心,四川 成都 610066
    2.成都市疾病预防控制中心,四川 成都 610041
  • 收稿日期:2025-02-04 修回日期:2025-02-25 出版日期:2026-01-15 发布日期:2026-02-06
  • 通信作者: 杨小媛,E-mail:37137847@qq.com
  • 作者简介:王春燕,女,副主任技师,主要从事水质、食品与公共场所卫生检验工作。

Research on the method of determining iodine content in urine by an automatic online iodine digestion analyzer

WANG Chunyan1, YANG Xiaoyuan2(), CAO Yuling1, YANG Yingxin1, WANG Bin1   

  1. 1. Chengdu Jinjiang District Center for Disease Control and Prevention,Chengdu,Sichuan 610066,China
    2. Chengdu Center for Disease Control and Prevention,Chengdu,Sichuan 610041,China
  • Received:2025-02-04 Revised:2025-02-25 Online:2026-01-15 Published:2026-02-06

摘要:

目的 为获得一种简便高效、准确灵敏、低成本的人体尿样中碘含量的检测方法,并证明该方法能代替传统砷铈催化分光光度法进行尿样中碘的检测。 方法 运用全自动在线消解碘分析仪对尿样进行自动在线消解后直接定量检测,同时使用传统砷铈催化分光光度法对尿碘标准溶液曲线、尿碘成分分析标准物质进行测定,并分析2种方法在标准曲线线性相关系数、方法检出限、准确度和精密度方面的差异。选取400份特殊人群尿样使用2种方法对其进行测定,并对检测数据进行分析。 结果 2种方法在碘含量0~300和300~1 200 μg/L范围内线性关系均良好,相关系数(r)绝对值均>0.999 0;碘分析仪法检出限为1.92 μg/L,传统分光光度法为2.90 μg/L;2种方法对4种浓度的尿碘成分分析标准物质的测定值均在规定的浓度范围内,碘分析仪法所得相对标准偏差(relative standard deviation,RSD)为1.369%~2.042%,传统分光光度法为2.738%~3.822%;加标回收率实验所得碘分析仪法回收率范围为93.53%~104.03%,传统分光光度法为91.37%~104.33%;400份特殊人群尿样不同配对组2种方法检测结果比较,差异均无统计学意义(均P>0.05)。 结论 全自动在线消解碘分析仪法在检测结果的准确度和可靠性方面与传统分光光度法一致,且在稳定性方面更可靠,重现性更高,实验条件更能精准控制,同时还能节约人力和试剂成本,减少污染,特别适用于基层单位大批量样品的快速检测。

关键词: 尿碘, 全自动在线消解碘分析仪, 砷铈催化分光光度法

Abstract:

Objective To obtain a simple,efficient,accurate,sensitive and low-cost method for the detection of iodine content in human urine samples,and to prove that this method can replace the traditional arsenic-cerium catalytic spectrophotometry for the detection of iodine in urine samples. Methods The fully automatic online digestion iodine analyzer was used to directly quantify urine samples after automatic online digestion. At the same time,the traditional arsenic-cerium catalytic spectrophotometry was used to determine the curve of urine iodine standard solution and urine iodine composition analysis reference material,then analyze the differences between the two methods in terms of linear correlation coefficient,method detection limit,accuracy and precision of the standard curve. A total of 400 urine samples from special populations were tested by two methods,and the test data were analyzed. Results Both of the two methods had a good linear relationship in the range of iodine content of 0-300 μg/L and 300-1200 μg/L,and the correlation coefficient(r) was greater than 0.999 0,and the detection limit of the iodine analyzer method was 1.92 μg/L,and that of the traditional spectrophotometric method was 2.90 μg/L. The measured values of the reference materials for the analysis of urine iodine composition at 4 concentrations by the two methods were within the specified range. The relative standard deviation(RSD) of iodine analyzer method was 1.369%-2.042%,and that of traditional spectrophotometry was 2.738%-3.822%. The recovery experiment showed the recoveries of iodine analyzer were 93.53%-104.03%,and 91.37%-104.33% for the traditional spectrophotometry. There was no statistically significant difference in the detection results of 400 urine samples from different groups of special populations(all P>0.05). Conclusion The automatic online iodine digestion analyzer method is consistent with the traditional spectrophotometry method in terms of accuracy and reliability of detection results,and is more reliable in terms of stability. It has higher reproducibility and more precise control of experimental conditions. At the same time,it can save manpower and reagent costs,reduce pollution,and is especially suitable for the rapid detection of large samples of grassroots units.

Key words: Urine iodine, Automatic online digestion of iodine analyzer, Arsenic-cerium catalyzed spectrophotometry

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