Abstract  

The chemical components of navel orange juice were analyzed by wooden-tip electrospray ionizaion mass spectrometry (wooden-tip ESI-MS) without any sample pretreatment. The results show that signals of choline, proline, glucose and sucrose are rapidly obtained in positive ion detection mode. Among them, choline and proline give a signal of ［M+H］+, and glucose and sucrose produce a signal of ［M+K］+. While in negative ion detection mode, organic acids including fatty acid, phenolic acids and hydroxyl acids are readily detected. Meanwhile, wooden-tip ESI-MS is developed for semi-quantification determination of ascorbic acid in navel orange juice. The limit of detection (LOD) is 3.7 μg/L, the relative standard deviations (RSD) are 7.4%-9.7%, and the analytical time of each detection is less than 0.5 min. Wooden-tip ESI-MS has the advantages of minor or no sample pretreatment, convenient operation, sensitivity and high analytical speed, which will being an attractive method to rapidly screen the quality of agricultural products.

Key words：navel orange; juice; components; wooden-tipe; ectrospray ionization mass spectrometry (ESI-MS)

2016-钟涛-质谱学报-牙签电喷雾电离质谱分析脐橙果汁成分.pdf