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Chinese Journal of Clinical Laboratory Management(Electronic Edition) ›› 2015, Vol. 03 ›› Issue (01): 17-22. doi: 10.3877/cma.j.issn.2095-5820.2015.01.006

• Quality Control • Previous Articles     Next Articles

Evaluation of the homogeneity and stability of HBV DNA and HCV RNA samples used for proficiency testing

Lingli Jiang1, Xueliang Wang1, Yun Bao1, Yanqun Xiao1, Hualiang Wang1,()   

  1. 1.Shanghai Center for Clinical Laboratory, Shanghai 200126, China
  • Received:2015-02-11 Online:2015-02-28 Published:2024-11-30
  • Contact: Hualiang Wang

Abstract:

Objective

To evaluate the homogeneity and stability of the HBV DNA and HCV RNA samples used for proficiency testing prepared by Shanghai Center for clinical laboratory (SCCL).

Methods

The experiment was designed according to the Guidance on Evaluating the Homogeneity and Stability of Samples Used for Proficiency Testing (CNAS-GL03) using samples from 2013 and 2014 proficiency testing. The homogeneity was evaluated by detecting 10 aliquots selected randomly from each positive sample. For stability, 6 aliquots of the randomly chosen 2 positive samples from each batch of proficiency test were analyzed one week after 2-8℃ preservation. Furthermore, synchronous stability was assessed by testing 6 aliquots of the above-mentioned 2 positive samples from the residue after distribution of proficiency testing. One way analysis of variance (ANOVA) and t test were used to analyze homogeneity and stability data, respectively.

Results

The F values of the 8 batches of HBV DNA samples were 0.6278,0.9861, 2.0286, 1.0507, 0.5305, 0.8244, 1.3941, 1.9126;P>0.05 respectively. The F values of the 7 batches of HCV RNA samples were 1.9664, 1.7057, 0.5418, 2.3076, 1.6260, 0.9965, 1.2252; respectively P>0.05. The t values of the 4 batches of HBV DNA samples were 1.96, 1.56, 0.92, 0.67 and were 1.17, 2.07,1.13, 0.52 in synchronous stability tests respectively . The t values of the 4 batches of HCV RNA samples were 2.05, 1.72, 1.63, 0.53 and were 0.66, 1.30, 0.66, 2.20 in synchronous stability tests respectively (P>0.05).

Conclusion

The HBV DNA and HCV RNA samples prepared by SCCL are both homogeneous and stable,which are suitable for proficiency testing.

Key words: Hepatitis B virus, Hepatitis C virus, Proficiency testing, Homogeneity, Stability

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