ISSN:
0049-8246
Schlagwort(e):
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Physik
Notizen:
Plants can be analysed for the elements sodium, magnesium, aluminium, silicon, phosphorus, sulphur, chlorine, potassium and calcium by X-ray fluorescent spectrometry using discs pressed directly from dried and ground plant material. Fine grinding is essential to avoid particle size effects and the finely ground samples are self supporting when pressed.Tables are given to correct for variations in absorption by the samples due to compositional changes, and also to correct for crystal fluorescence or scatter so that background measurements are not necessary on each sample.Calibration has been made using chemicals added to cellulose and the results obtained on a series of samples agree (essentially within one standard deviation) with the mean values obtained by other methods. Results are also given for the standard kale sample.
Zusätzliches Material:
5 Tab.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/xrs.1300060104
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