chromatogramof phthalates, dioctyl phthalate, dibutyl phthalate, dipropyl phthalate, diethyl phthalate, dimethyl phthalate,

2d abstract analytical analytics chemical chemistry chromatography composition data diagram flora formula gas gc graphic high hplc medicinal performance physical range research scale science scientific signal study tech vector wave peak chromatogram phthalates dioctyl dibutyl dipropyl diethyl dimethyl propylbenzene ethylbenzene toluene benzene