HPLC Determination of α-keto Acids in Human Serum and Urine after Derivatization with4-Nitro-1,2-phenylenediamine. Pak. J. Anal. Environ. Chem. [Internet]. 2025 Apr. 16 [cited 2025 Nov. 5];14(1):16-25. Available from: https://pjaec.pk/index.php/pjaec/article/view/359