Organochlorine pesticide analysis in milk by gas-diffusion microextraction with gas chromatography-electron capture detection and confirmation by mass spectrometry - Lobato, Alnilan Cristina Barros; Fernandes, Virgínia Cruz; Pacheco, João G; Matos, Cristina Delerue; Gonçalves, Luís Moreira (Journal of Chromatography A, 2021)