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PID Vttection3 <br /> Sensitivity <br /> (fls ) <br /> lb-mol etected "+ Apparent benzene detected <br /> iv�lrocerbay� ,mmol actual Ub <br /> -paxafina 0.098 0.0118 <br /> iao 4 <br /> Cycloparaffins 0.128 0.0563 <br /> jwno-olef ins 0.822 0.0622 <br /> aromatics 1.08 0.3672 <br /> Gasoline 0.5175 <br /> $� The sensitivities are based on an average from each bydro- <br /> earbon group using volume fractions for the various el.mpo- <br /> ,Dents to arrive at a representative number. <br /> IV. Molar Ratio of Gasoline to ]benzene (Rgb) <br /> Rgb ] lb-mole gasoline _ <br /> .5175 lb-mole benzene apparent a 3.93 <br /> V. Conversion faetor: PID read <br /> in to asolire basis <br /> 1' Z Rgb ` g ` Pa * T/MWa <br /> where: P conversion factor <br /> Z unit conversaion ¢ 1air <br /> 0-6 Ib mole benpzpmlb sole <br /> Rgb - molar ratio, of gasoline to benzene <br /> 1.93 lb-mol$ asolinient <br /> lb-Mole benzene appg <br /> KWg molecular weight of gasoline w 96 lb/lb-mole <br /> Pa density of air a 0.074 lb/ft3 <br /> KWa molecular weight of air a 29 ib/lb-sole <br /> T . time conversion factor Q 1440 BID/day <br /> F (10-6) (1.93) ('36)(0.074)(1440)/29 <br /> r a 6.8 a 10-4 (lb asoline)(minl <br /> Titair day Ppm <br />