Elemental Analysis, Separation Science, And Metallography News By LECO

Protein Analysis – Dumas vs. Kjeldahl

May 17, 2022

A Small Overview and Comparison

The protein content in food and feeds is one of the parameters that are commonly analysed within most routine control samples in a food laboratory. Generally, the two most used reference methods/technologies are the wet chemistry method after Kjeldahl and the combustion method after Dumas.

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Vertical vs Horizontal Furnaces: The Dumas Method for Protein Determination

October 20, 2021

The Dumas method has several advantages over the Kjeldahl method: it is much faster, with much lower operating costs, no real safety issues, and no toxic waste produced. However, there is a debate over which of the two main approaches to the Dumas method is better: a vertical or a horizontal combustion furnace. Determined to settle the question on which method is more precise and offers the most advantages, LECO chemists analyzed many sample types in both an FP828 and an FP928.

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