Kuklenyik Z, Panuwet P, Jayatilaka NK, Pirkle JL, Calafat AM. Two-dimensional high performance liquid chromatography separation and tandem mass spectrometry detection of atrazine and its metabolic and hydrolysis products in urine. J Chromatogr B Analyt Technol Biomed Life Sci. 2012 Jul 15; 901:1-8.