本文件提供了在乳品加工的在线和在线应用中使用红外光谱的指南。这些应用与ISO 21543 | IDF 201中所涵盖的应用不同。 适用但不限于: -使用中红外和近红外光谱法测定液态奶和奶制品中的蛋白质、脂肪和总固体； -使用近红外光谱法测定固体或半固体产品（如奶粉、黄油和液态奶流）中的蛋白质、脂肪和水分。

This document gives guidelines for using infrared spectrometry in in-line and on-line applications for dairy processing. These applications are distinct to those covered in ISO 21543 | IDF 201. It is applicable, but not limited, to: — the determination of protein, fat and total solids in liquid milk and milk products using mid and near infrared spectrometry; — the determination of protein, fat and moisture in solid or semi-solid products, such as milk powder, and butter and liquid dairy streams using near infrared spectrometry.