Standard test method for air and carbon tetrafluoride in sulfur hexafluoride by gas chromatography 用气体色层分离法对六氟化硫中空气和四氟化碳含量的标准试验方法
3.
Standard test method for carbon tetrachloride and chloroform in liquid chlorine by direct injection gas chromatographic procedure 用直接注射法对液态氯中四氟化碳和三氯甲烷的标准试验方法