Abstract：To validate the key parameters of the real time PCR method for GM maize NK603,the result shows that this real time PCR method can be used to assign the value for GM maize NK603 matrix reference material.Seven laboratories are chosen to characterize the property values of three different GM content matrix reference materials by using the same method.Although different types of instruments are used by different lab,the standard curve generated by each lab is comparable which indicate that this method has a good reproducibility.The statistic test shows the data from different labs with equal.The values and expanded uncertainties for three matrix GM reference material are 0.57%±0.11%,1.21%±0.30% and 4.92%±1.80%(k=2).
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2012, Vol. 33 
