發送短信 : A simple high-performance liquid chromatography coupled to fluorescence detection method using column-switching technique for measuring urinary 1-hydroxypyrene from environmental exposure

 __   _     _____     _____    _    _     _____   
| || | ||  |  ___||  / ____|| | || | ||  /  ___|| 
| '--' ||  | ||__   / //---`' | || | || | // __   
| .--. ||  | ||__   \ \\___   | \\_/ || | \\_\ || 
|_|| |_||  |_____||  \_____||  \____//   \____//  
`-`  `-`   `-----`    `----`    `---`     `---`