Methods:The residual solvents in ephedrine hydrochloride,which are benzene,toluene,ethyl benzene,m-xyleme,σ-xyleme and p-xyleme,were quantitatively determined by headspace GC on SUNELCOTM NUKOLTM column,with FID detecter,helium as the carries with 2.
结果:外标法测定盐酸麻黄碱原料中苯、甲苯、乙基苯、间二甲苯、对二甲苯、邻二甲苯(二甲苯苯系物BTEX)的残留量,分离度均大于1。