Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 7 pdf
Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 7 pdf
... identification: 77 , 123, and 65. • Suggested surrogate/IS: aniline d 5 , 4-fluoroaniline, and 1-fluoronaphthalene. • Samples collected in glass containers, refrigerated, extracted within 7 days of ... 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...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần pps
... © 19 97 by CRC Press LLC © 19 97 by CRC Press LLC Handbook of Environmental Analysis Chemical P ollutants in Air, Water, Soil, and Solid Wastes Pradyot Patnaik, ... 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 struc...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 3 pptx
... 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 sample may interfere ... phenolphthalein alkalinity . In such alkalinity titration, phenolphthalein or metacresol purple may be used as an indicator. On the other hand, the total alkalinity is mea...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 4 pptx
... occurrence in waters and sludge is primarily attributed to its formation resulting from the reduction of nitrogen-containing organics, deamination of amines and hydrolysis of urea, and also to ... © 19 97 by CRC Press LLC © 19 97 by CRC Press LLC NITR OGEN (AMMONIA) Ammonia (NH 3 ) occurs in v arying concentrations in groundwater, surface water, and...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 5 ppt
... Chlorosub- stitution in positions 2, 3, 7, and 8 gives 2,3 ,7, 8-tetrachlorodibenzo- p -dioxin (2,3 ,7, 8-TCDD), CAS [ 174 6-01-6], occurring in trace amount in chlorophenoxy- acid herbicide, 2,4,5-T. 2,3 ,7, 8-TCDD ... and 2 57. 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 ar...
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Chemical Pollutants in Air, Water, Soil, and Solid Wastes Phần 8 pps
... 106.18; CAS [1330-20 -7] ; [95- 47- 6] for o-xylene, [108-38-3] for m- xylene and [106-42-3] for p-xylene; used as a solvent and in the manufacture of dyes and drugs; occurs in gasoline and petroleum solvents; ... (p-Xylene) CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 3 .76 © 19 97 by CRC Press LLC APPENDIX B SAMPLE CONTAINERS, PRESERVATIONS, AND HOLDING TIMES Analyte Container Pres...
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