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Nitrogen assay in winter wheat by short-time instrumental photon activation analysis and its comparison with the Kjeldahl method |
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| Authors: | Mádlíková Marcela Krausová Ivana Mizera Jiří Táborský Jan Faměra Oldřich Chvátil David |
| Institution: | 1.Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 542/2, 160 00, Praha 6, Czech Republic ;2.Nuclear Physics Institute, Czech Academy of Sciences, Hlavní 130, 250 68, ?e?, Czech Republic ;3.Institute of Rock Structure and Mechanics, Czech Academy of Sciences, V Hole?ovi?kách 41, 182 09, Praha 8, Czech Republic ;4.Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycká 21, 165 00, Praha 6, Czech Republic ; |
| Abstract: | The nitrogen content in winter wheat from various crops grown organically or conventionally was determined by instrumental photon activation analysis. The method utilizes measurement of the annihilation gamma line at 511 keV from the short-lived photoactivation product 13N, corrected for interference contributions from other positron emitting nuclides. Results compared well to those obtained by the Kjeldahl method. A positive impact of conventional agriculture on higher crude protein content in grain was found. Analysis of whole kernels and their germination and growth after irradiation were also tested. |
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