ISO 8573-7:2003规定了一种试验方法，用于将活的、菌落形成的微生物（如酵母、细菌、内毒素）与压缩空气中可能存在的其他固体颗粒区分开来。它是一系列旨在协调空气污染测量的标准之一，提供了采样、培养和确定微生物颗粒数量的方法。本试验方法适用于根据ISO 8573-1确定纯度等级，当需要识别也可行的菌落形成单元的固体颗粒时，可与ISO 8573-4结合使用。

ISO 8573-7:2003 specifies a test method for distinguishing viable, colony-forming, microbiological organisms (e.g. yeast, bacteria, endotoxins) from other solid particles which may be present in compressed air. One of a series of standards aimed at harmonizing air contamination measurements, it provides a means of sampling, incubating and determining the number of microbiological particles. The test method is suitable for determining purity classes in accordance with ISO 8573-1, and is intended to be used in conjunction with ISO 8573-4 when there is need to identify solid particles that are also viable, colony-forming units.