This document specifies the terms and definitions, method principles, equipment and instruments, reagents, environmental requirements and test conditions, sample preparation, test procedures, and result calculation for the determination of free quartz content in kaolin clay. This document is applicable to the qualitative and quantitative determination of free quartz (α-SiO2) in soft kaolin products. Other types of kaolin products can be used as a reference.
T/CSTM 00185-2021 history
2021T/CSTM 00185-2021 Test method for the content of free quartz in kaolin clay