Environmental Sampling and Analysis for Metals - Chapter 4 docx

... amine N-nitrosodi-n-propyl amine Nitroaromatics Nitrobenzene 2 , 4- Dinitrotoluene 2,6-Dinitrotoluene Phenols 2 , 4- Dimeethylphenol Nitrophenols 2-Nitrophenol 4- Nitrophenol 2 , 4- Dinitrophenol 4, 6-Dinitro- o-cresol Chlorophenols 2-Chlorophenol 4- Chloro-m-cresol 2 , 4- Dichlorophenol 2 ,4, 6-Trichlorophenol Pentachlorophenol 2,3,7,8-Tetrachlorodibenzol-p-dioxin ... 1260) Pesticides A...

Ngày tải lên: 12/08/2014, 03:20

... Press LLC 110 Environmental Sampling and Analysis for Metals digestion or another method is used for sample preparation (see Chapter 15), carry standards through the same procedure used for samples. The ... Add 2 ml of this stock solution to each 100-ml standard and sample prior to analysis. © 2002 by CRC Press LLC 120 Environmental Sampling and Analysis for M...

Ngày tải lên: 12/08/2014, 03:20

... LLC 122 Environmental Sampling and Analysis for Metals 8.2.3 REAGENTS 8.2.3.1 Air The air used should be cleaned and dried through a suitable filter to remove oil, water, and other for- eign substances. ... standards before dilution with calcium solution; and Cr based on original standards before addition of H 2 O 2 . See methodologies for determining these metals in...

Ngày tải lên: 12/08/2014, 03:20

... hydroxide precipitates and set- tles to form rust on the surface of the iron. © 2002 by CRC Press LLC 34 Environmental Sampling and Analysis for Metals Inadequate iron intake causes iron-deficiency anemia, ... Silver has FIGURE 2 .4 Formula of vitamin B 12 . © 2002 by CRC Press LLC 16 Environmental Sampling and Analysis for Metals alkaline earth metal is less reac...

Ngày tải lên: 12/08/2014, 03:20

... Learning. Fax 800 73 0-2 215.) © 2002 by CRC Press LLC 46 Environmental Sampling and Analysis for Metals Metals can form lipid-soluble organo-metallic ions, involving Hg, As, Sn, Tl, and Pb, capable ... Press LLC 54 Environmental Sampling and Analysis for Metals 3 .4. 3.8 Platinum (Pt) Oral exposure is unknown. After inhalation, lung clearance is rather slow, a...

Ngày tải lên: 12/08/2014, 03:20

... 206.83 30 217.58 10.0 100 As 193.70 50 189. 04 b 10.0 100 Ba 45 5 .40 2 49 3 .41 1.0 50 Be 313. 04 0.3 2 34. 86 1.0 10 B 249 . 74 5 249 .68 1.0 50 Cd 226.50 4 2 14. 44 2.0 50 Ca 317.93 10 315.89 10.0 100 Cr ... CRC Press LLC 1 74 Environmental Sampling and Analysis for Metals 12.5 REAGENTS AND STANDARDS 12.5.1 C HEMICALS, STANDARDS, AND REAGENTS • Chemicals and reag...

Ngày tải lên: 12/08/2014, 03:20

... 212 Environmental Sampling and Analysis for Metals 14. 7 .4 SAMPLE FIELD LOG AND PRESERVATIVE PREPARATION LOG Other field records are the sample field log (Figure 14. 5) and preservative ... the chain-of-custody form, and record all sampling data in the field notebook, as discussed in Section 14. 7.1. 14. 9.2 DRINKING WATER SAMPLING 14. 9.2.1 Sampling Potable Well Wa...

Ngày tải lên: 12/08/2014, 03:20

... CRC Press LLC Sample Preparation for Metals Analysis 245 15. 14. 4 REAGENTS 15. 14. 4.1 Tetrahydrofurane, ACS Reagent Grade 15. 14. 4.2 Toluene, ACS Reagent Grade 15. 14. 4.3 Acetic Acid, 0.5N Preparation ... of a sample duplicate) 4. One sample duplicate © 2002 by CRC Press LLC 248 Environmental Sampling and Analysis for Metals TABLE 15 .4 Disposal Log Form for Dig...

Ngày tải lên: 12/08/2014, 03:20

... standards should be prepared at the time of analysis. To each of the 100-ml standards and the sample, add 2.0 ml of 40 % ammonium phosphate solution (40 g (NH 4 ) 2 HPO 4 per 100 ml of reagent-grade ... con- tain higher concentrations. Selection of method: Use the FAAS (Chapter 8), GrAAS (Chapter 9), or ICP (Chapter 12) method. © 2002 by CRC Press LLC 286 Environmental Sampling...

Ngày tải lên: 12/08/2014, 03:20

... LLC 318 Environmental Sampling and Analysis for Metals enter the upper, normally empty conduction band of silicon and allow the solid to conduct. This type of material is called an n-type semiconductor ... glassware in a regular garbage container! © 2002 by CRC Press LLC 3 24 Environmental Sampling and Analysis for Metals POTASSIUM Form of uptake: ion Role: enzyme a...

Ngày tải lên: 12/08/2014, 03:20