An uncompetitive exogenous internal amplification control method (EIAC) was developed on the basis of short synthetic DNA segment, whose amplification can be detected in real time by UFA spectroscopy principle. The EIAC was shown to be useful as internal control in diagnostic test systems based on DNA or RNA detection by multiplex real-time PCR. It can be applied to assess the quality of extracted DNA or RNA, and also to detect and study the factors causing PCR inhibition and earlier plateau effect.
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