ISO 21570:2005提供了使用聚合酶链反应（PCR）检测食品中转基因生物（GMO）的定量方法的总体框架。 它定义了DNA目标序列特定扩增的一般要求，以量化相对转基因衍生DNA含量，并确认扩增DNA序列的身份。 ISO 21570:2005中规定的指南、最低要求和性能标准旨在确保在不同实验室获得可比较、准确和可再现的结果。 ISO 21570:2005适用于食品基质，但也适用于其他基质，如。 g、 从环境中采集饲料和植物样本。

ISO 21570:2005 provides the overall framework of quantitative methods for the detection of genetically modified organisms (GMO) in foodstuffs, using the polymerase chain reaction (PCR). It defines general requirements for the specific amplification of DNA target sequences in order to quantify the relative GMO-derived DNA content and to confirm the identity of the amplified DNA sequence. Guidelines, minimum requirements and performance criteria laid down in ISO 21570:2005 are intended to ensure that comparable, accurate and reproducible results are obtained in different laboratories. ISO 21570:2005 has been established for food matrices, but is also applicable to other matrices, e.g. feed and plant samples from the environment.