@article{xiong_zhao_yang_2017,  title={Development of Manual Shaking and Ultrasound-Assisted Surfactant-Enhanced Emulsification Microextraction for Analysis of Organophosphorus Pesticides in Aqueous Samples},  volume={28},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20170096},  DOI={10.21577/0103-5053.20170096},  number={12},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Xiong, Ya-Bing and Zhao, Yue and Yang, Zhong-Hua},  year={2017},  month={Dec},  pages={2421–2428} }