Solid-phase-extraction-assisted dispersive liquid-liquid microextraction based on solidification of floating organic droplet to determine sildenafil and its analogues in dietary supplements
Jing Li, Si Hun Roh, Jia Shaodong, Ji Yeon Hong, Dong-Kyu Lee, Byong-kyu Shin, Jeong Hill Park, Jeongmi Lee*, Sung Won Kwon*
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