Assignment 5

Assignment 5 - groundwater sample as the matrix spike and...

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Assignment, Sept 28, 2010. 1. Which of the following is used for the acid digestion of samples containing metals: a) EPA 3000 series, b) EPA 3510 series, c) EPA 3540 series, d) EPA 3560 series? 2. What are the hazardous characteristics described/targeted by SW-846? 3. Which method in SW-846 is used to test the toxicity characteristics of waste? 4. Describe the difference between EPA method 624 and 625. EPA 624 for VOC analysis using GC-MS EPA 625 for SVOC analysis using GC-MS 5. Which EPA method would you use for the analysis of industrial wastewater sludge for cadmium, mercury and chromium to evaluate whether the sludge can be disposed in a non-hazardous landfill. 6. A 100 μ L stock solution containing 1000 mg/L Pb was added to a 100mL
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Unformatted text preview: groundwater sample as the matrix spike and acid digested. The Pb concentration measured by ICP-MS was 0.095 mg/L after a tenfold dilution. Calculate the percentage recovery. 7. Explain what type of laboratory QC samples should be used in the following cases: a. To determine the effect of matrix interferences on analytical accuracy of a sample b. To determine the analytical precision of a sample batch c. To determine whether memory (carryover) effects are present in an analytical run with an instrument. d. To establish that laboratory contamination does not cause false positives e. To know whether an extraction procedure is appropriate or not....
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This note was uploaded on 09/26/2011 for the course ES 462 taught by Professor Unc during the Spring '11 term at NMSU.

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