ASSESSING THE POTENTIAL OF THE GLOW DISCHARGE OPTICAL EMISSION SPECTROSCOPY FOR SPECIATION: APPLICATION TO CHROMATE CONVERSION COATINGS

Julien Malherbe, Hervé Martinez, Olivier F. X. Donard, John Sieber, Stephen E. Long and Greg Turk

Affiliation: CSTL/Analytical Chemistry Division, NIST Gaithersburg , MD 20899

Solid-state speciation is today a growing tool in numerous technological and environmental problems. The impact on human health being dependent on the chemical form of an element, new regulations impose threshold concentrations on specific forms of elements, such as the hexavalent chromium (Cr⁶⁺) used as anticorrosion coatings (named chromium conversion coatings or CCCs) in the automotive industry, rather than on their global concentrations. The choice of solid-state technique to unveil the speciation of a sample is quite restrictive; mainly XPS/AES and EXAFS/XANES are the most reliable techniques in this field. However, as these highly complex/expensive techniques are difficult to implement as routine techniques, a pre-screening approach to choose the samples of interest prior further analysis could be useful. Such fast technique as Glow Discharge Optical Emission Spectroscopy could, in certain cases, fulfill this role.

Your Name:  Malherbe Julien

Mentor’s name: Gregory Turk

Division: Analytical Chemistry Division

Laboratory: Inorganic Chemical Metrology group

Room and Building address: Bdg 227, B360, 100 bureau Drive, Gaithersburg, MD, 20899

Mail Stop: MS 8391

Telephone : 301-975-6276

FAX : 301-869-0413

Email: julien.malherbe@nist.gov

Whether you and/or your mentor are Sigma Xi members: no

You must choose a category that best describes your poster: Chemistry