Environmental Sampling and Analysis for Metals - Chapter 12 doc

... Press LLC 174 Environmental Sampling and Analysis for Metals 12. 5 REAGENTS AND STANDARDS 12. 5.1 C HEMICALS, STANDARDS, AND REAGENTS • Chemicals and reagents should be ultra-high-purity grades, ... Press LLC 166 Environmental Sampling and Analysis for Metals The ICP discharge is very intense, brilliant white, and teardrop-shaped. Figures 12. 1 and 12. 2...

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... Biphenyls (PCBs) PCB-1016 (Aroclor 1016) PCB -1 22 1 (Aroclor 122 1) PCB -1 23 2 (Aroclor 123 2) PCB -1 24 2 (Aroclor 124 2) PCB -1 24 8 (Aroclor 124 8) PCB -1 28 4 (Aroclor 128 4) PCB -1 26 0 (Aroclor 126 0) Pesticides Aldrin Dieldrin Chlordane α-Endosulfate Endrin Endrin ... amine N-nitrosodi-n-propyl amine Nitroaromatics Nitrobenzene 2,4-Dinitrotoluene 2,6-Dinitrotoluene Phenols 2,4-...

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... 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 Metals TABLE 7.2 Maintenance of Atomic Absorption ... Press LLC 110 Environmental Sampling and Analysis for Metals digestion or another method is used for sample preparation (see Chapter 15), carry standards...

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... Press 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 ... 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 Chapt...

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... 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 reactive and harder. For example, lithium ... 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 iro...

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... 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 ... 800 73 0-2 215.) © 2002 by CRC Press LLC 48 Environmental Sampling and Analysis for Metals Aluminum compounds are used for storing and processing food (e.g.,...

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... LLC 218 Environmental Sampling and Analysis for Metals 12. If the analysis request is for suspended and dissolved metal determination, the sample should be filtered prior to preservation and treated ... the sampling activities: • Selection of proper sampling equipment (preferred materials for sampling and purging equip- ment for metals analysis include Tef...

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... Preparation for Metals Analysis 235 following metals: Be, Cd, Cr, Co, Pb, Mo, Tl, and V. (Digestion and GrAAS analysis for As, Se, and Ag are different. The digestion procedure for As and Se is ... Warming fa- cilitates the subsampling of crude type oils, greases, and wax-type wastes. Xylene is usu- ally the preferred solvent for long-chain hydrocarbons and for mo...

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... 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 and Analysis for ... Sampling and Analysis for Metals 18 .12. 1 GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY (GRAAS) 18 .12. 1.1 Instrument Parameters • Drying time and temperature: 30 sec...

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... containers in a separate cabinet labeled “Solvents” and in a well- ventilated area. © 2002 by CRC Press LLC 312 Environmental Sampling and Analysis for Metals add water to the acid, as this produces ... 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 mat...

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