Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 2 doc

... 1997 by CRC Press LLC © 1997 by CRC Press LLC Handbook of Environmental Analysis Chemical P ollutants in Air, Water, Soil, and Solid Wastes Pradyot Patnaik, Ph.D. LEWIS PUBLISHERS Boca ... confidence and legally defensible. The quality assurance plan includes documentation of sampling events, receipt of samples in the laboratory, and their relinquish to respe...

... priority pollutants by U.S. EPA and their methods of analysis are documented (U.S. EPA 1984-19 92; Methods 601, 6 12, 624 , 625 , 501, 5 02, 503, 524 , 824 0, and 826 0). In this chapter, halogenated ... 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...

... ethanol reacts with 3 mol O 55 2 227 22 2 + →+ 323 ) 2 Fe O KCrO acid Fe O (Metal ion is oxidized to higher oxidation state. 2+ 2 227 3+ – + → +22 ) 2. 18 ... equal volume of MgSO 4 ⋅ 7 H 2 O (22 .5 g/L), FeCl 3 ⋅ 6 H 2 O (0 .25 g/L), and CaCl 2 (27 .5 g/L) and diluting into desired v olume of r...

... and 25 7. Use either 37 Cl 4 - 2, 3,7,8-TCDD or 13 C 12 -2, 3,7,8-TCDD as an internal standard. The m/z for these two internal standards are 328 and 3 32, respectively. When using ... Chlorosub- stitution in positions 2, 3, 7, and 8 gives 2, 3,7,8-tetrachlorodibenzo- p -dioxin (2, 3,7,8-TCDD), CAS [1746-01-6], occurring in trace amount in chlorophenoxy...

... Amberlite 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 ... 123 , and 65. • Suggested surrogate/IS: aniline d 5 , 4-fluoroaniline, and 1-fluoronaphthalene. • Samples collected in glass containers, refrigerated, extracted within...

... Cl 2 C=CCl 2 ; MW 165. 82; CAS [ 127 -18-4]; used in dry cleaning and metal degreasing; colorless liquid with ether-like odor; boils at 121 °C; freezes at 22 °C; vapor pressure 19 torr at 25 °C; ... characteristic ion 23 7; the secondary ions for compound identification 29 5, 20 8, 23 5, and 26 6 (electron impact ionization); peak intensity ratios for m/z 23 7 :29 5 :20 8...