婴儿配方乳粉中维生素B1、B2含量测定能力验证

目的设计组织婴儿配方乳粉中维生素B_1、维生素B_2含量测定能力验证项目,评价实验室检测婴儿配方乳粉中维生素B_1、维生素B_2的技术能力和水平。方法考核样品中的维生素B_1、维生素B_2在P0.05显著水平时是否均匀,且在整个计划周期内稳定,满足能力验证的要求。通过实施能力验证计划,对来自27个省(自治区)、直辖市的33家实验室的测定结果与指定值比对得到相对偏差,评价实验室检测能力。结果在参加实验室中,维生素B_1总体满意率为90.6%;维生素B_2总体满意率为84.8%。结论多数参加实验室检测能力结果满意,表明乳粉中维生素B_1、维生素B_2检测水平总体良好。对于离群结果进行技术分析,可以帮助实验室查找原因并进行整改。

Proficiency testing on the determination of vitamin B1 and B2 in infant formula milk powder

Objective To design and organize the proficiency testing program for determination of vitamin B1 and B2 in infant formula milk powder so as to assess the proficiency and level of the laboratories. Methods The vitamin B1 and vitamin B2 in the samples were tested to see whether they were uniform at the significant level of P<0.05, stable in the whole planning period, and meeting the requirements of ability verification. Examining sample was conducted through the implementation of the plan of ability test and verify, 33 laboratories from 27 provinces and the autonomous region were measured and the results were compared with designated value and then got the relative deviation, which used for evaluating the laboratory testing capability. Results In all of the laboratories participated in the determination of vitamin B1 and vitamin B2, the total satisfactory rate of vitamin B1 was 90.6%, while vitamin B2 was 84.8%. Conclusion The majority of the participant laboratories pass the test with satisfactory results, indicating that the determination of vitamin B1 and vitamin B2 in milk powder shows an overall good level. The outlier results are analyzed to help laboratory find the cause and carry out rectification.