6533b858fe1ef96bd12b6184
RESEARCH PRODUCT
Improved technique for quantitative EDXRF analysis of powdered plant samples
Eva Selin LindgrenJohan BomanMartins Stikanssubject
Detection limitChemistrySample (material)Analytical chemistrySample preparationAdhesiveRotationSpectroscopyExcitationIntensity (heat transfer)Beam (structure)description
An improved technique for energy-dispersive x-ray fluorescence analysis of powdered plant samples is presented. It is based on the use of a special rotating and moveable sample holder (RMSH). This sample holder provides both controlled rotation and lateral transfer movements of the sample while a measurement is carried out, consequently simulating homogeneous excitation conditions over the sample. In this way it compensates for effects caused by the typical inhomogeneous distribution of intensity within the x-ray beam exciting the elements in the sample. The sample consists of powdered dry plant material deposited in an easy way on an adhesive tape, providing a stable layer of plant particles covering the surface. The mean size of the particles fixed on the tape results in a thin or intermediate thickness sample, 0.8-2.5 mg cm -2 . The application of RMSH provides an easy sample preparation method and improved performance, lowering the detection limits of the measurements and resulting in reproducible, reliable and consistent data.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-11-01 | X-Ray Spectrometry |