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IN the course of experiments on the intermediary metabolism of amino-acids it was found necessary to determine small quantities of glutamic acid. Methods used by previous workers either require large quantities or are unspecific [Foreman, 1914; Jones & Moeller, 1928; Braunstein & Kritzmann, 1937]; on the suggestion of Dr H. A. Krebs a new method has therefore been worked out which is more specific than the older methods and permits the accurate determination of glutamic acid in amounts from 0.1 mg. upwards.
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Philip P. Cohen (1939) studied this question.
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