Improved direct method for determination
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Hirohiko Katsuki; Tsuya Yoshida; Chizuko Tanegashima; Shozo Tanaka
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Article
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1971
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Elsevier Science
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English
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A large number of reports have appeared for the determination of keto acids by the DNP\* method. The outline of the method is as follows: Keto acid in water solution is converted to DNPH derivative. Then the DNPH, after extraction with water-immiscible organic solvent, is transferred to water soluti