Pages • 4
External StandardEssay Preview: External StandardReport this essayMETHOD:1- An External Standard is prepared as follows: 1cm³ of cyclohexane, 1 cm³ of toluene and 1 cm³ of ethylbenzene were well mixed with each other in a small conical flask and seal it with septum. This is an equivolume mixture. The external standard could contain any amount of.