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Gas Chromatographic Determination of Purines and Pyrimidines from DNA Using Ethyl Chloroformate as Derivatizing Reagent. Pak. J. Anal. Environ. Chem. [Internet]. 2016 Jan. 1 [cited 2025 Jul. 12];17(1):50 – 57. Available from: http://pjaec.pk/index.php/pjaec/article/view/243