食品中のビタミンCの定量法に關する知見(續)

概要

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On the formaldehyde method for estimation of true vitamin C.The use of formaldehyde for the estimation of true vitamin C as suggested by Lugg was examined.The method depends on the fact that at pH 3.5〜3.8 and in the presence of 8% HCHO, ascorbic acid is quickly removed from reaction by condensation, whereas reductones are but slowly removed.As compared with the value obtained by the new enzymic method which is described in Chapter 5,the formaldehyde method is not very accurate for the differentiation of ascorbic acid from reductone. Besides that when glutation was present in the exts, it is also subjected by formaldehyde and causes the error for the determination of true vitamine C.
社団法人日本生物工学会の論文
1950-07-15