ISO 23909:2008规定了从大样本制备实验室样本的方法。根据ISO 11464和ISO 14507，考虑以下分析:物理化学参数的测定、中等挥发性有机污染物的测定和非挥发性污染物的测定。 当必须分析挥发性有机化合物时，ISO 23909:2008不适用。

ISO 23909:2008 specifies a method for the preparation of laboratory samples from large samples. In accordance with ISO 11464 and ISO 14507, the following analyses are considered: determination of physico-chemical parameters, determination of moderate volatile organic contaminants, and determination of non-volatile contaminants. ISO 23909:2008 is not applicable when volatile organic compounds have to be analysed.