Development of coupled ultrasound-assisted and reversed-phase dispersive liquid-liquid microextraction before high-performance liquid chromatography for the sensitive determination of vitamin A and vitamin E in oil samples

2015 ◽  
Vol 38 (18) ◽  
pp. 3254-3261 ◽  
Author(s):  
Nasser Goudarzi ◽  
Sahar Farsimadan ◽  
Mansour Arab Chamjangali ◽  
Ghadam Ali Bagherian
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