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Quantifying the measurement uncertainty of the nopaline synthase terminator in mixed samples of genetically modified rice using a bottom-up approach

文献类型: 外文期刊

作者: Song, Jun 1 ; Niu, Bei 2 ; Wang, Dong 1 ; Zhang, Fuli 1 ;

作者机构: 1.Sichuan Acad Agr Sci, Analyt & Testing Ctr, Chengdu 610066, Peoples R China

2.Chengdu Univ, Sch Med, Chengdu 610106, Peoples R China

关键词: GMOs;Rice;Quantitative assay;MU;Bottom-up approach

期刊名称:FOOD CONTROL ( 影响因子:5.548; 五年影响因子:5.498 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: In this study, we report a method to estimate the measurement uncertainty (MU) when testing genetically modified organisms (GMOs) using a bottom-up approach. The repeatability of the test, the linear calibration, the purity of the reference DNA, weighing, the determination of the DNA concentration, and transferring precise volumes with a liquid with pipette were considered MU sources within the real-time quantitative PCR assay of the nopaline synthase terminator. The terminator's concentration in a mixed sample with an expanded MU was 11.25 +/- 1.6%, indicating that 14.2% of the concentration gave an estimated expanded MU. The largest MU originated from pipetting errors and the smallest MU originated from the purity of the reference DNA. Compared with the other sources, the MU from the purity of the reference DNA was negligible. We recommend that the MU be determined when testing food and feed products because of the importance in providing analytical data for GMO threshold compliance decisions. In practice, estimating the MU using the bottom-up approach is suitable for the routine detection of GMOs in a sample in a single testing laboratory. (C) 2016 Elsevier Ltd. All rights reserved.

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