Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 8 pps

... 139.1, and 1 38. 4°C, respectively; their vapor pressures at 20°C are 6.7, 8. 4, and 8. 8 torr, respectively; density 0 .88 0, 0 .86 4, and 0 .86 1 g/ml respectively; practically insol - uble in water; readily ... solvent and in the manufacture of dyes and drugs; occurs in gasoline and petroleum solvents; colorless liquid with characteristic odor; boiling point for o-,...

Ngày tải lên: 08/08/2014, 00:22

... 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 ... therefore, important to examine the type of compounds that are to be analyzed and certain physical and chemical properties of these compounds. Information regarding the st...

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... 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 8. 3, ... 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 s...

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... terminal oxygen atom is replaced by a nitrogen atom. Triazine is a nitrogen heterocyclic ring containing three N atoms in the ring. NCO O (leaving group) R 1 R 2 1. Carbamate NCO O (leaving group) R 1 R 2 2. ... 3 ) occurs in v arying concentrations in groundwater, surface water, and waste water. Its occurrence in waters and sludge is primarily attributed to its formation...

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... 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- acid herbicide, 2,4,5-T. 2,3,7 ,8- TCDD ... the characteristic m/z for 2,3,7 ,8- TCDD are 319 .89 65 and 321 .89 36. The m/z for the corresponding 37 C l4 - and 13C 12 -isomers in HRMS are...

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... 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 ... Press LLC 382 396 HANDBOOK OF ENVIRONMENTAL ANALYSIS Air drawn through a midget impinger containing a 10% solution of equal parts of ρ -dimethylaminobenzaldehyde and diphenyl...

Ngày tải lên: 08/08/2014, 00:22