Sarva Mangala PraveenaTang Seok LuiNur Aqilah HaminSiti Quistina Noorain Abdul RazakAhmad Zaharin Aris2024-05-202024-05-202016Praveena, S. M., Lui, T. S., Hamin, N. A., Razak, S. Q. N. A., & Aris, A. Z. (2016). Occurrence of selected estrogenic compounds and estrogenic activity in surface water and sediment of Langat River (Malaysia). Environmental monitoring and assessment, 188, 1-11.https://repoemc.ukm.my/handle/123456789/1569The occurrence and estrogenic activities of steroid estrogens, such as the natural estrone (E1), 17β estradiol (E2), and estriol (E3), as well as the synthetic 17α-ethynylestradiol(EE2), were investigated in eight sampling points along the Langat River (Malaysia). Surface water samples were collected at 0.5 m and surface sediment 0-5 cm from the river surface. Instrument analysis of steroid estrogens was determined by UPLC-ESI-MS with an ultra-performance liquid chromatograph (Perkin Elmer FX15) coupled to a Q Trap function mass spectrophotometerenOccurrenceSteroid estrogenEstrogenic activityLangat RiverJournal