GB/T 7702.12-1997 in English

《GB/T 7702.12-1997煤质颗粒活性炭试验方法 氯乙烷蒸气防护时间的测定》由518（中国兵器工业集团公司）归口，主管部门为中国兵器工业集团公司。
本标准规定了煤质颗粒活性炭在规定条件下对氯乙烷蒸气防护时间测定所需仪器和试剂、测定步骤及测定结果的处理等内容。本标准适用于煤质颗粒活性炭氯乙烷蒸气防护时间的测定，也适用于其他颗粒活性炭和浸渍活性炭氯乙烷蒸气防护时间的测定。

Scope

This standard specifies the instruments and reagents, measurement procedures and treatment of measurement results required for the determination of the protection time of coal-based granular activated carbon against ethyl chloride vapor under specified conditions. This standard applies to the determination of the protection time of coal-based granular activated carbon from ethyl chloride vapor, and also applies to the determination of the protection time of other granular activated carbon and impregnated activated carbon from ethyl chloride vapor.