Development of the certified reference material of cadmium in human urine (freeze-dried)
10.3760/cma.j.cn121094-20200120-00033
- VernacularTitle:冻干人尿中镉标准物质的研制
- Author:
Yajuan PAN
1
;
Jing ZHANG
;
Fugang ZHANG
;
Huifang YAN
Author Information
1. 100050 北京，中国疾病预防控制中心职业卫生与中毒控制所
- Keywords:
Cadmium;
Urine, Human;
Certified reference material;
Uncertainty
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2021;39(3):220-223
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To develop the certified reference material of cadmium in human urine (freeze-dried) .Methods:Urine were collected from normal human, and then the urine samples were prepared by adding standard, mixing, packing and freeze-drying. After homogeneity test and stability test, the urine samples were determined by two methods in seven independent laboratories, the uncertainty of the certified reference material was evaluated.Results:Take at least 0.20 ml solution of the certified reference material per use, and the homogeneity is good. The freeze-dried materials can be kept stable for 12 months at ≤4 °C, and the re-dissolved reference materials can be stabilized for 7 days at 4 °C. The standard values and uncertainty of the two levels were (5.34±0.34) μg/L and (15.47±0.72) μg/L, respectively.Conclusion:The standards met the requirements of national standards, and can be used to verify the methods of detecting cadmium in human urine and to detect the samples.
