The test method for determining residual vinyl chloride monomer content in parts per billion level in PVC resin by capillary column gas chromatography headspace technique is suggested.
提出用大口径毛细管顶空进样气相色谱法对聚氯乙烯树脂中十亿分之一级残留氯乙烯含量的测量方法。
Objective: Using the headspace Gas - chromatography methods to measure the assay of residual solvent (acetone, ethylene chloride and ethanol) in Cefazolin sodium.
目的：建立一种气相色谱法同时测定原料药头孢唑林钠中有机溶剂丙酮，二氯甲烷、乙醇残留量的方法。
Toxaphene, an organic chloride insecticide possesses a long residual period.
毒杀芬为有机氯杀虫剂的一种，残效期长。
The residual ferric chloride, and chlorine remaining in the vapor after recovery of the titanium tetrachloride may be recycled.
残余氯化铁，和氯的蒸气后有剩余的四氯化钛的复苏可能会被回收。
The present invention discloses the preparation process of vinylidene chloride from dichloroethane rectifying residual liquid.
本发明公开了由二氯乙烷的精馏残液制偏二氯乙烯的方法。
The present invention discloses the preparation process of vinylidene chloride from dichloroethane rectifying residual liquid.
本发明公开了由二氯乙烷的精馏残液制偏二氯乙烯的方法。
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