Gorin N
Z Lebensm Unters Forsch. 1976 Nov 24;162(3):259-61. doi: 10.1007/BF01113307.
In apples, L-malate was significantly less when estimated by titration with NaOH than by spectrophotometry after enzymatic reduction of NAD+ with malate dehydrogenase. The second method would determine L-malate in the form of salts as well as free acid.
在苹果中,用氢氧化钠滴定法估算的L-苹果酸含量明显低于用苹果酸脱氢酶将NAD⁺酶促还原后用分光光度法测得的含量。第二种方法能测定盐形式以及游离酸形式的L-苹果酸。