Pluangklang T, Rimmai A, Sermsaeng K, Noibungkha S, Lao-ngam C, Chonsalasin L. Improvement of extraction efficiency for spectrophotometric determination of NO3- and NO2- in Gunshot residues; An application for a shooting distance study. Asian Health Sci.Tech.Rep. [internet]. 2018 Sep. 24 [cited 2026 Aug. 30];26(3):133-4. available from: https://ph03.tci-thaijo.org/index.php/ahstr/article/view/1676