Correction for protein content in the determination of the glucosinolate content of rapeseed by the X-RF method
1992
Zhao, F. | Evans, E.J. | Bilsborrow, P.E. | Schnung, E. | Syers, J.K.
Thirty, six rapeseed samples from a factorial designed nitrogen and sulphur trial were analysed for total glucosinolate content by the X-ray fluorescence (X-RF) and HPLC methods and for protein content by the Kjeldahl method. Protein content varied from 16.0 to 22.6%. Correction for seed protein content in the calculation of glucosinolate content by X-RF significantly improved the agreement between the two methods of glucosinolate analysis. The following equation was used in the correction: Y = 14.99 [S(mg g-1) - protein %/7.5].
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