The feasibility of using a portable analytical instrument, the Niton XRF XLt 500He, was tested as a technique for sulfur analysis of wet sediment or soil samples in the field. The effect of sample preparation on the precision and accuracy of sulfur determination was specifically evaluated. The Niton XRF XLt 500He uses X-ray fluorescence to detect different elements. This unit employs a helium purge to allow the analysis of elements lighter than potassium. Samples with sulfur varying from 0.3 to 2.0% were successfully measured with the instrument. The precision of the unit is excellent and the limit of detection can be extremely low with careful attention to sample preparation. The quantitation limit was estimated as 237 ppm sulfur.
Berger, Michael; Zou, Ling; and Schleicher, Robert
"Analysis of Sulfur in the Copper Basin and Muddy RIver Sites Using Portable XRF Instrumentation,"
Proceedings of the Annual International Conference on Soils, Sediments, Water and Energy:
Vol. 13, Article 2.
Available at: http://scholarworks.umass.edu/soilsproceedings/vol13/iss1/2