The GB/T 2 2428.2 - 2008 standard is used to determine the water content of starch hydrolysis products. It describes the determination principle in detail, standardizes the applicable test methods and operation procedures such as the Karl Fischer method, and clarifies the performance indicators of required instruments and equipment such as Moisture Analyzer. There are also strict requirements for sample collection and processing. This standard provides a unified and accurate basis for water content detection for starch hydrolysis product manufacturers and related testing institutions, which is conducive to controlling product mass, meeting the strict standards for product water content in different application scenarios, and promoting the standardized development of starch hydrolysis product industry.