Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 9 potx

... © 199 7 by CRC Press LLC © 199 7 by CRC Press LLC Handbook of Environmental Analysis Chemical P ollutants in Air, Water, Soil, and Solid Wastes Pradyot Patnaik, ... © 199 7 by CRC Press LLC © 199 7 by CRC Press LLC PRECISION AND ACCURACY OF ANALYSIS QUALITY ASSURANCE AND QUALITY CONTR OL IN ENVIRONMENTAL ANALYSIS Quality as...

... two end points commonly fixed in the determination of alkalinity are the pH 8.3 and pH 4.5 (or between 4.3 and 4 .9, depending on the test conditions). When the alkalinity is determined to pH ... such interference effect. Remove free chlorine in the sample by adding Na 2 S 2 O 3 solution. In addition, the presence of oxidizing and reducing agents in the sampl...

... © 199 7 by CRC Press LLC © 199 7 by CRC Press LLC NITR OGEN (AMMONIA) Ammonia (NH 3 ) occurs in v arying concentrations in groundwater, surface water, and waste water. ... waters, and hazardous wastes. These nitrosamines are listed in Table 2.16.1. Such pollutants occurring in environmental samples can be determined by U.S. EPA’s analytical proce...

... 3 19. 896 5 and 321. 893 6. The m/z for the corresponding 37 C l4 - and 13C 12 -isomers in HRMS are 327.8847 and 331 .93 67, respectively. The quantitation is performed by the internal standard ... POLYCHLORINATED DIOXINS AND DIBENZOFURANS Polychlorinated dibenzo- p -dioxins and dibenzofurans are tricyclic aromatic compounds having the following structures: Chl...

... XAD-2. • Monomethylamine interferes in the test; interference is removed by passing air through an impinger containing 0.5% CuCl 2 solution before drawing the air through the solid adsorbent. •A ... © 199 7 by CRC Press LLC © 199 7 by CRC Press LLC 382 396 HANDBOOK OF ENVIRONMENTAL ANALYSIS Air drawn through a midget impinger containing a 10% solution...

... 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-mL sample volume (subject to matrix interference). • ... (p-Xylene) CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 3.76 © 199 7 by CRC Press LLC APPENDIX B SAMPLE CONTAINERS, PRESERVATIONS, AND HOLDING TIMES Analyte Container P...