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...
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...
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...
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...
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...
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...
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