... identification: 91 , 92 , 39, 65; peak ratios 91 :92 : 39: 65 = 100:73:20:14 (Hites, 199 2).• Limit of detection: in the range 0.5 µ g/L when detected by PID for a 5-mLsample volume (subject to matrix interference).• ... (p-Xylene)CH3CH3CH3CH3CH3CH33.76© 199 7 by CRC Press LLC APPENDIX BSAMPLE CONTAINERS, PRESERVATIONS, AND HOLDING TIMES Analyte Container PreservationMaximumholdingtime Inorganics and microbial tests ... g/mLat 20°C; insoluble in water; slightly soluble in alcohols; dissolves in benzene,toluene, hexane, petroleum ether, and gasoline; highly toxic (Patnaik, 199 2). ANALYSIS OF AQUEOUS AND NONAQUEOUS...