Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 3 pptx
Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 3 pptx
... 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...
Ngày tải lên: 08/08/2014, 00:22
Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 4 pptx
... Ammonia (NH 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 resulting from ... 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...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần pps
... 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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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 5 ppt
... 2 ,3, 7,8-TCDD are 32 0, 32 2, and 257. 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 32 8 and 33 2, ... respectively. When using high resolution mass spectrometry (HRMS), the characteristic m/z for 2 ,3, 7,8-TCDD are 31 9.8965 and 32 1.8 936 . The m/z for the corresponding...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 7 pdf
... 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 38 2 39 6 HANDBOOK OF ENVIRONMENTAL ANALYSIS Air drawn through a midget impinger containing a 10% solution of equal parts of ρ -dimethylaminobenzaldehyde and diphenyl...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 8 pps
... (p-Xylene) CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 3.76 © 1997 by CRC Press LLC APPENDIX B SAMPLE CONTAINERS, PRESERVATIONS, AND HOLDING TIMES Analyte Container Preservation Maximum holding time Inorganics ... 36 .46 Iodine I 2 2 53. 80 126.90 Mercuric nitrate Hg(NO 3 ) 2 32 4.61 162 .30 Nitric acid HNO 3 63. 01 63. 01 Potassium biiodate KH(IO 3 ) 2 38...
Ngày tải lên: 08/08/2014, 00:22