1. Gross alpha, beta gamma method 9310: gross alpha and gross beta, part of test methods for evaluating solid waste, physical/chemical methods;United States Environmental Protection Agency,1986
2. Sample preparation procedure for spectrochemical determination of total recoverable elements;United States Environmental Protection Agency;Method,1991
3. Method 200.9, revision 2.2: determination of trace elements by stabilized temperature graphic furnace atomic absorption;United States Environmental Protection Agency,1994
4. EPA method 3050B (SW-846): acid digestion of sediments, sludges, and soils;United States Environmental Protection Agency,1996
5. EPA method 300.1, revision 1.0: determination of inorganic anions in drinking water by ion chromatography;United States Environmental Protection Agency,1997