Tests with contaminated paper

This is followed by decontamination of exposed areas of skin with 0.5% hypochlorite solution or the M291 (or M258A1) decontamination kits. The CAM or M8 paper may be used to test for contamination before and after decontamination. It is generally believed that removal of the protective clothing will... 

Isolation of Product. Allow the reaction mixture to cool to room temperature and, in the hood, remove the flask. Transfer the reaction solution using a Fhsteur pipet to a 50-mL Erlenmeyer flask containing 12 mL of ice-cold water. Rinse the round-bottom flask with an additional 3 mL of ice-cold water, and transfer the rinse to the same Erlenmeyer flask in Uke manner. Now add, in small portions, 6 M HQ ( 8 mL) until a white precipitate forms and the solution tests weakly acidic to pH paper. Collect the precipitate of frans-cinnamic add by vacuum filtration using a Hirsch funnel. Wash the white crystals with three 2-mL portions of cold water. To partially dry the material, continue the suction for an additional 15 min (remember to cover the Hirsch funnel with filter paper to protect the filter cake from contamination with dust from the laboratory atmosphere during the extended air-drying period). 

The inspector s working standard for the surface finish of blast-cleaned steel is now the new British Standard . In the special circumstances where absolute freedom from soluble contaminants such as ferrous sulphate is necessary, the specification should include reference to a test for removal of such residual salts, e.g. the potassium ferricyanide test . The area to be sampled should be wetted with a fine spray of distilled water and the paper held against it. The development of blue spots on the paper indicates the presence of ferrous salts on the surface. 

The present paper tests the assumed original and enhancement mechanisms with rates and conversions for a broad range of contaminants measured under a fixed mass concentration (50 mg/m ) feed condition. The plots compared are reaction rates vs. (1) dark adsorption, Ot. (2) second order rate constant for (OH ) (TCE absent) or (Cl ) (TCE present), and (3) the product of these gas phase second order rate constant times the reactant dark coverage. Where a second order gas phase rate constant was not available, we estimated its value from correlations of kci vs. koH for tke same class of compounds. 

A field test for the detection of TNT in contaminated soils (e.g., near ammunition plants) was based on the color reaction between TNT and alkalis (the Janowski reaction [7]) [26]. A few milligrams of the suspected soil are placed on filter paper and sprayed with 1 M NaOH acetone (1 1). A red color indicates the possible presence of TNT. Detection limits were reported to be 2-50 mg of TNT per 1 kg of soil, depending on the type of soil. The same group [55] used the oxidation of DPA in concentrated H2SO4 as the basis of a field test for nitrate esters and nitramines in soil. 

In this paper, we have presented a system for generating contaminated test air. We have shown that the system can generate test air at two levels (readily expandable to three levels by the use of a third pump) with reasonable accuracy. A broad... 

Clean the ATR crystal by thoroughly wiping it with low-lint tissue papers as many times as needed. To ensure absence of cross-contamination, apply the next test sample... 

Lopez-Avila, V. Dodhiwala, N.S. and Beckert, W.F. Off-line Supercritical Fluid Extraction Technique for Difficult Environmental Matrices Contaminated with Compounds of Environmental Significance. Paper presented at the Sixth Annual Waste Testing and Quality Assurance Symposium, Washington, D. C., July 1990. 

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