Huy, B. V., Tùng, T. Q., & Đăng Giao, L. V. . (2017). DETERMINATION OF NICOTINE IN TOBACCO WORKER’S URINE USING LIQUID-LIQUID EXTRACTION AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY (GC-MS). Hue University Journal of Science: Natural Science, 126(1A), 141-149. https://doi.org/10.26459/hueuni-jns.v126i1A.4329