Sherif Taha

mass spectrometry food testing who fao jmpm sample preparation sample processing certified reference material laboratory capability food trad food legiselation food safety pesticides extraction mass to charge time of flight orbitrap linear ion trap quadrupole ion motion esi ei apci electrospray ionisation negative chemical ionisation chemical ionisation electro ionization m/z analyser mobile phase normal phase rp phase hplc column liquid chromatography buffer hplc program temperature liner split-splitless gc column gas chromatography