介绍了用离心沉降对紫胶脱蜡和四氯化碳萃取精制紫胶蜡的研究过程和结果。
The research is made on dewaxing shellac by centrifugal subside and refining shellac-wax by Carbon tetrachloride extraction.
使用固相微萃取装置用气相色谱电子捕获检测器测定饮用水中氯仿和四氯化碳。
By using solid phase microextraction instrument, chloroform and tetrachloromethane in drinking water was detected in ECD of gas chromatography.
使用正己烷作为萃取和测试溶剂，同国标方法（GB/T16488-1996）所用的四氯化碳相比可减少对测试人员的伤害。
The method that using n-hexane as an extractant had a little injure to lab assistant, as compared with CCl_4 used by GB/T16488-1996 method.
使用正己烷作为萃取和测试溶剂，同国标方法（GB/T16488-1996）所用的四氯化碳相比可减少对测试人员的伤害。
The method that using n-hexane as an extractant had a little injure to lab assistant, as compared with CCl_4 used by GB/T16488-1996 method.
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