DETERMINATION OF 32 MAJOR AND TRACE-ELEMENTS OF 3 NIST SOIL SRMS USING ICP-AES AND WDXRF

The National Institute for Standards and Technology (NIST) has recentl y released three soil standard reference materials that are uncontamin ated (SRM 2709), moderately contaminated (SRM 2711), and highly contam inated (SRM 2710) with metals. The SRMs were analyzed at the U.S. Geol ogical Survey (USGS) for thirty two major, minor and trace elements us ing a combination of wavelength dispersive X-ray fluorescence spectros copy (WDXRF) and inductively coupled plasma atomic emission spectrosco py (ICP-AES). Good agreement is observed between NIST certified values and USGS results. The wide concentration ranges for most transition m etals should make these SRMs useful in assessing the accuracy of metho ds used in geochemical exploration and environmental studies.