Hilp M
Institut für Pharmazeutische Chemie, Philipps-Universität, Marburg, Germany.
Pharmazie. 2001 Jul;56(7):548-51.
The identification of lactate according to Ph. Eur. 1997 and DAB 2000 uses the oxidation of lactic acid to pyruvic acid by boiling with bromine water in sulphuric acid. Acetaldehyde arising by decarboxylation is detected according to Legal applying a time consuming and troublesome procedure. 1,3-Dibromo-5,5-dimethylhydantoin (DBH) as well as potassium bromate can replace elemental bromine. Lactic acid and all lactates of Ph. Eur. 1997 and DAB 2000 can be identified better and faster using lactate oxidase (LOD, test strip system Accusport). According to DAB 2000 the base of ethacridine lactate has to be separated. This is no longer necessary, if an enzymatic identification is applied.
根据欧洲药典1997版和德国药典2000版对乳酸的鉴别,是利用乳酸在硫酸中与溴水煮沸氧化成丙酮酸。脱羧产生的乙醛则根据利伯曼反应进行检测,该过程耗时且麻烦。1,3 - 二溴 - 5,5 - 二甲基海因(DBH)以及溴酸钾可替代单质溴。使用乳酸氧化酶(LOD,Accusport试纸条系统)能够更快速、准确地鉴别欧洲药典1997版和德国药典2000版中的乳酸及所有乳酸盐。根据德国药典2000版,必须分离乳酸依沙吖啶的碱。若采用酶法鉴别,则不再需要进行此操作。