Preparation of Polyamidoamine Dendrimer Modified Magnetic Nanoparticles and Its Application for Reliable Measurement of Sudan Red Contaminants in Natural Waters at Parts-Per-Billio... oleh Yalin Wu, Yalin Wu, Huahua Bai, Qingxiang Zhou, Shuangying Li, Yayang Tong, Jinghan Guo, Boyao Zhou, Zhi Li, Yali Zhan, Menghua Liu, Yanhui Li, Tongxu Qu