An adsorbent calix[4]arene carboxylic acid was employed as the adsorption material for on-line flow in jection(FI) micro-column preconcentration coupled with fl
Sulfonamide residue in honey existed in a form bonded to sugar via the N-glycosidic bond.It would result in the possible underestimation of concentration of sul
A high performance liquid chromatography coupled with electrospray ionization-tandem mass spectrome try(HPLC-ESI-MS/MS) method was developed for the analysis an