检验医学 ›› 2015, Vol. 30 ›› Issue (12): 1226-1228.DOI: 10.3969/j.issn.1673-8640.2015.12.015

• 技术研究与评价·论著 • 上一篇    下一篇

溶出伏安法检测尿碘的方法学评价

许中1, 盛青松2, 张同军3, 辛君伟3   

  1. 1.苏州市立医院东区同位素室,江苏 苏州 215001
    2.无锡市申瑞生物制品有限公司,江苏 无锡 214092
    3.江苏省丝网印刷电极式生物传感器工程技术研究中心,江苏 无锡214092
  • 收稿日期:2014-12-31 出版日期:2015-12-20 发布日期:2016-01-04
  • 作者简介:null

    作者简介:许 中,男,1961年生,副主任技师,主要从事临床实验室诊断及管理工作。

    通讯作者:盛青松,联系电话:0510-85998839。

  • 基金资助:
    江苏省自然科学基金资助项目(BK2012539)

Methodological evaluation on stripping voltammetry for urinary iodine determination

XU Zhong1, SHENG Qingsong2, ZHANG Tongjun3, XIN Junwei3   

  1. 1. Department of Isotope, Suzhou Municipal Hospital, Jiangsu Suzhou 215001, China
    2. Wuxi Shenrui Bio-Pharmaceuticals Co., Ltd., Jiangsu Wuxi 214092, China
    3. Jiangsu Engineering Technology Research Center for Screen-Printed Biosensor, Jiangsu Wuxi 214092, China
  • Received:2014-12-31 Online:2015-12-20 Published:2016-01-04

摘要:

目的 验证溶出伏安法测定尿碘的临床应用性能。方法 采用SR-I-100尿碘专用型微量元素检测仪(溶出伏安法)测定人尿冻干粉和尿临床样本,验证溶出伏安法的正确度、精密度、线性、交叉污染、最低检测限,并与过硫酸铵消化-砷铈催化分光光度法进行比较。结果 溶出伏安法测定低(104 μg/L)、高(486 μg/L)浓度人尿冻干粉的相对偏倚分别为-1.76%和3.62%;测定低(80.89 μg/ L)、中(210.33 μg/ L)、高(538.50 μg/ L)3个浓度尿样本的变异系数(CV)分别为9.81%、4.27%、3.64%;尿碘浓度在100~540 μg/ L时检测呈线性,线性回归方程为Y=88.525X-6.678 0,R2=0.993 1;样本间不存在交叉污染;检测低限为50 μg/L(CV=12.85%)。溶出伏安法与过硫酸铵消化-砷铈催化分光光度法的测定结果差异无统计学意义(P>0.05),且相关性良好(R2=0.97)。结论 溶出伏安法测定尿碘有良好的正确度、精密度、线性和检测限,不存在交叉污染,可在临床上推广应用。

关键词: 溶出伏安法, 碘, 尿液, 芯片传感, 砷铈催化分光光度法

Abstract:

Objective To evaluate the performance of stripping voltammetry for urinary iodine determination.Methods The trueness, precision, linear, cross-contamination and detection limit were analyzed by measuring human urinary freeze-dried powder and urine samples by stripping voltammetry using SR-I-100 microelement analyzer for urinary iodine, and the results were compared with those of arsenic cerium catalytic spectrophotometry. Results By stripping voltammetry, the biases of human urinary freeze-dried powders in low and high urinary iodine levels(104 μg/L and 486 μg/L)were -1.76% and 3.62%. The coefficients of variation (CV) for low, medium and high levels of urine samples (80.89 μg/L, 210.33 μg/L and 538.50 μg/L) were 9.81%, 4.27% and 3.64%. When the linear range was 100-540 μg/L, the equation of linear regression was Y=88.525X-6.678 0, R2=0.993 1.There was no cross-contamination.The lowest detection limit was 50μg/L. The CV was 12.85%. Between arsenic cerium catalytic spectrophotometry and stripping voltammetry, there was no statistical significance (P>0.05), and the correlation was good(R2= 0.97). Conclusions The stripping voltammetry has good trueness, precision, linear and detection limit without cross-contamination,and is suitable for clinical application.

Key words: Stripping voltammetry, Iodine, Urine, Chip-sensor, Arsenic cerium catalytic spectrophotometry

中图分类号: