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A collaborative study on the determination of tryptophan in feedingstuffs
Author(s) -
Westgarth David R.,
Williams Alwyn P.
Publication year - 1974
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740250517
Subject(s) - cottonseed , tryptophan , soya bean , food science , chemistry , chromatography , cottonseed oil , biochemistry , amino acid
The results are reported of collaborative work carried out at eight laboratories to assess the Miller 1 and Spies and Chambers 2 procedures for the determination of tryptophan in protein concentrates and gave values for groundnut, soya bean and cottonseed meals of 1.0, 1.4 and 1.2 g/16 g N, respectively. The results obtained by both methods were similar, though collaborators preferred the Miller method.