Dumas method as an alternative approach for determining protein contents of plant products — comparative study with Kjeldahl method
Kinga Myszka
k.myszka@ihar.edu.plSamodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie (Poland)
Beata Kamińska
Samodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie (Poland)
Anna Fraś
Samodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie (Poland)
Magdalena Ploch
Samodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie (Poland)
Danuta Boros
Samodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie (Poland)
Abstract
Increased qualitative demand for the knowledge of protein contents in various plant products as well in foods and feeds has led to wider used of the Dumas method, which is even older technique than commonly employed Kjeldahl procedure. Aim of the study was to compare the results of protein contents of 138 samples of cereal grains, such as wheat, barley and oat and 5 samples of meals produced from rapeseed and soybean in Polish agricultural conditions, obtained by the Kjeldahl and Dumas methods. Very high correlation coefficient was obtained between protein contents analysed with the Dumas and Kjeldahl methods, equal to 0.9983 for the entire material tested. However, the results obtained by Dumas method were, on average, by 0.46 percentage units higher than those analysed with Kjeldahl procedure. The differences between methods applied depended on the materials to be analysed. These results suggest that Dumas method can be successfully used as an alternative method for testing content of protein in cereal grains and rapeseed and soybean meals.
Keywords:
cereal grains, Dumas method, Kjeldahl method, rapeseed meal, soybean meal, total nitrogenReferences
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Authors
Kinga Myszkak.myszka@ihar.edu.pl
Samodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie Poland
Authors
Beata KamińskaSamodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie Poland
Authors
Anna FraśSamodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie Poland
Authors
Magdalena PlochSamodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie Poland
Authors
Danuta BorosSamodzielna Pracownia Oceny Jakości Produktów Roślinnych, Instytut Hodowli i Aklimatyzacji Roślin — PIB w Radzikowie Poland
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Copyright (c) 2011 Kinga Myszka, Beata Kamińska, Anna Fraś, Magdalena Ploch, Danuta Boros
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