检验医学 ›› 2018, Vol. 33 ›› Issue (8): 755-759.DOI: 10.3969/j.issn.1673-8640.2018.08.019

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尿素、尿酸和总蛋白复合冰冻人血清国家标准品的研制

于婷1, 沈敏2, 孙楠1, 曲守方1, 黄杰1()   

  1. 1. 中国食品药品检定研究院非传染病诊断试剂室 卫生部生物技术产品检定方法及其标准化重点实验室,北京 100050
    2. 美康生物科技股份有限公司参考实验室,浙江 宁波 315104
  • 收稿日期:2017-08-20 出版日期:2018-08-10 发布日期:2018-09-07
  • 作者简介:null

    作者简介:于 婷,女,1978年生,博士,研究员,主要从事体外诊断试剂检定和标准物质研制工作。

Development of national standard materials of urea,uric acid and total protein in compound frozen human serum

YU Ting1, SHEN Min2, SUN Nan1, QU Shoufang1, HUANG Jie1()   

  1. 1. Department of In Vitro Diagnostics for Non-Infections Diseases,National Institutes for Food and Drug Control,Key Laboratory of Method and Standardization for Quality Control of Biotechnical Products,Beijing 100050,China
    2. Reference Laboratory,MedicalSystem Biotechnology Co.,Ltd.,Ningbo 315104,Zhejiang,China
  • Received:2017-08-20 Online:2018-08-10 Published:2018-09-07

摘要:

目的 研制尿素、尿酸和总蛋白复合冰冻人血清国家标准品,用于校准和评价常规方法,促进尿素、尿酸和总蛋白测定的标准化。方法 收集含不同浓度尿素、尿酸和总蛋白的血清(无溶血、脂血和黄疸)样本,过滤除菌后分装,于-70 ℃保存。采用单因素方差分析评价候选品的均匀性。通过线性回归方差分析进行稳定性研究。采用参考方法或经验证的方法定值,计算不确定度。对候选品及25份新鲜血清样本在参考方法(或经验证的方法)及3个常规检测系统间的互通性进行评估。结果 候选品中尿素、尿酸和总蛋白均匀性检验F值分别为1.071 4、1.339 9和1.275 0,均<F0.05。在-20 ℃条件下,候选品中尿素、尿酸和总蛋白均至少可稳定37 d;在2~8 ℃条件下,尿素可稳定27 d,尿酸及总蛋白至少可稳定37 d;在20~25 ℃条件下,尿素仅能稳定3 d,尿酸可稳定8 d,总蛋白可稳定27 d。定值结果分别为:尿素(5.68±0.17)mmol/L(k=2)、尿酸(288.68±3.96)μmol/L(k=2)、总蛋白(67.03±3.46)g/L (k=2)。尿素、尿酸和总蛋白浓度全部在25份血清样本的回归直线95%可信区间范围内。结论 研制的尿素、尿酸和总蛋白复合冰冻人血清国家标准品候选品均匀性、稳定性、互通性良好,定值准确、可靠。

关键词: 尿素, 尿酸, 总蛋白, 冰冻人血清, 国家标准品

Abstract:

Objective To develop the national standard materials of urea,uric acid and total protein in compound frozen human serum,to calibrate and evaluate conventional methods,and to improve the standardization of urea,uric acid and total protein determinations.Methods Serum samples with different levels and without hemolysis,lipemia and choloplania were collected. After filtration and sterilization,serum pools were packed in freezing tubes and stored in -70 ℃. The homogeneity was evaluated by single factor analysis of variance. The stability was evaluated by linear regression analysis. The value was assigned by reference methods or validated method,and the uncertainty was calculated. The commutability of 25 serum samples between reference method and 3 conventional analysis systems was evaluated.Results The F values of homogeneity for urea,uric acid and total protein were 1.071 4,1.339 9 and 1.275 0,respectively. All of them were <F0.05. The stabilities of urea,uric acid and total protein in candidates can be last at least 37 d at -20 ℃,at least 27,37 and 37 d at 2-8 ℃ and at least 3,8 and 27 d at 20-25 ℃,respectively. The assigned values of candidates for urea,uric acid and total protein were(5.68±0.17) mmol/L(k=2),(288.68±3.96)μmol/L(k=2),(67.03±3.46)g/L(k=2). The linearities for urea,uric acid and total protein for25 samples were all within 95% confidence interval range.Conclusions The homogeneity,stability and commutability of candidates all meet the requirements,and the assigned value is accurate and reliable.

Key words: Urea, Uric acid, Total protein, Frozen human serum, National standard material

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