and selected concentrations with correlation coefficient more than 0.99. Benzene could be precisely quantified in the calibration range with detection limit of 0.20 lL L1 (0.18 lg L1 ) a
and selected concentrations with correlationcoefficient more than 0.99. Benzene could be precisely quantifiedin the calibration range with detection limit of 0.20 lL L1(0.18 lg L1) a