Determination of organic acids in urine by solid-phase microextraction and gas chromatography-ion trap tandem mass spectrometry previous ‘in sample’ derivatization with trimethyloxonium tetrafluoroborate

2008 ◽  
Vol 22 (10) ◽  
pp. 1155-1163 ◽  
Author(s):  
Marco Pacenti ◽  
Stefano Dugheri ◽  
Fabio Villanelli ◽  
Gianluca Bartolucci ◽  
Luca Calamai ◽  
...  
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