ISSN:
0049-8246
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
Two widely used concentration calculation techniques, emission-transmission and elemental sensitivity methods, were compared. In the determination of the trace element content of environmental materials (e. g. plants, soil), the mass absorption coefficients for the exciting and characteristic x-rays are dominated of the ‘non-detectable’, light major components. When using the elemental sensitivity method, these mass absorption coefficients must be a known a priori. When using the emission-transmission method, the combined attenuation of the incident and fluorescence x-rays within the specimen for the ith element is determined experimentally. The trace element content of biological materials was determined with both methods and the concentrations obtained were compared by t-test and one-way analysis of variance methods. In the case of available reference materials the concentration values obtained with these methods were compared with the certified values.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/xrs.1300240409
Permalink
