Ultrasound-assisted ionic liquid dispersive liquid–liquid microextraction coupled with high performance liquid chromatography for sensitive determination of trace celastrol in urine

2011 ◽  
Vol 879 (30) ◽  
pp. 3429-3433 ◽  
Author(s):  
Jian-Nan Sun ◽  
Yan-Ping Shi ◽  
Juan Chen
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