NAS TOM #JOSSEY BAS EAS 413/A1300 Environmental Geochemistry Overview: Name Anysia- Ngokila Instruments Used for Inorganic Analysis The purpose of this exercise is to understand the capability and limitations of several instruments used for geochemical analysis of environmental samples. Read the following: Description of the electromagnetic spectrum and UV-Visible Spectroscopy http://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/Spectrpy/UV- 0 0 vis/spectrum.htm (Sections 1-3) http://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/Spectrpy/UV- vis/uvspec.htm#uvl "Guide to Inorganic Analysis" by Perkin-Elmer Questions 1. a. List the detection limits (in µg/L) of the following elements on a Flame AA, graphite furnace AA, ICP-OES and ICP-MS. (7pts) Question 1 Flame AA GFAA ICP-OES ICP-MS EPA MCL Question 2 Instruments (Q3) Al As Ba Cd Cu Pb Se b. How many μg/L are in 1 mg/kg? Show your calculations. (2 pts) 2. In the table above, record the EPA maximum contaminant levels (MCLS) for drinking water (if applicable). You can find these concentrations on the web page: https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water- regulations#Inorganic (7 pts)

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