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International collaborative study of an automated method for the determination of crude protein in fish‐meals
Author(s) -
Barlow S. M.,
Bimbo A.,
Jensen O. Bjørn,
Smith G. L.
Publication year - 1981
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.2740320715
Subject(s) - kjeldahl method , repeatability , fish <actinopterygii> , fish meal , acetanilide , significant difference , food science , chemistry , chromatography , fishery , mathematics , biology , nitrogen , statistics , organic chemistry
An automated macro‐Kjeldahl instrument (Kjel‐Foss) determines protein at the rate of 20 samples in 1 h. The methodology is similar to the Kjeldahl method officially recommended by the IAFMM for fish‐meal. The two methods were compared in a collaborative study. Six fish‐meals, tryptophan and acetanilide were analysed by 15 participating laboratories. The results showed good agreement between the two methods. There was little difference between the two methods in terms of repeatability in the laboratory, but variability between laboratories was significantly less when the automated method was used.