Antonelli, Terry, Stout & Kraus
Liquid chromatographic method and apparatus for analyzing biological samples
 Physiologically active substances contained in a biological sample not subjected to deproteinization can be converted to their derivatives at a high efficiency without being adversely affected by the protein present in the sample, and accordingly the analysis of said physiologically active substances in the form of said derivatives can be performed at a high precision. 
Hitachi, Ltd.
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Masahito Yoshio Kasumi Junkichi Hiroshi
Ito Fujii Yoshida Miura Satake