Wooden-tip electrospray ionization mass spectrometry for trace analysis of toxic and hazardous compounds in food samples

摘要

Wooden-tip electrospray ionization (wooden-tip ESI) is applied to the rapid, in situ, direct qualitative and quantitative trace analysis of toxic and hazardous compounds in food samples. To evaluate the potential of wooden-tip ESI mass spectrometry (MS) in food analysis, pesticides, toxicants, date-rape drugs, and illicit additives were detected in various food samples. Wooden-tip ESI-MS experiments were performed using wooden tip sampling and ionization, with examination using MS and tandem mass spectrometry (MS/MS). The results proved that wooden-tip ESI allows the detection and confirmation of traces of toxic and hazardous compounds in food. In addition, selected analytes in beverages were obtained at absolute levels as low as a??10 pg. Quantitation of analytes in liquid and powder samples was also evaluated. Single sample analysis was completed within 2 min. The data obtained shows that the wooden-tip ESI-MS is a promising tool for rapid analysis of food samples.