Volatile organic compounds (VOC) 11 components: 200ug/ml each of Chlorobenzene ; 1,2-Dichlorobenzene; cis-1,2-Dichloroethylene; trans-1,2-Dichloroethylene; 1,2-Dichloropropane; Ethylbenzene; Styrene; Tetrachloroethylene; Toluene; o-Xylene; p-Xylene, 1 ml (Matrix: Methanol) , (Concentration200 mg/l)