Abstract
For the first time, the characteristic fragment(m/z 85) of protonated melamine generated in MS/MS spectra recorded using surface desorption atmospheric pressure chemical ionization mass spectrometry has been employed as a molecular probe to image melamine distributed in boiled eggs. With a special resolution of 0.06 mm2, the imaging obtained in x, y dimensions visualized extremely uneven distribution of melamine in the egg samples(ca. 1244 mm2), and most melamine(99. 8%) was distributed in egg white region. The ratio of the unit sampling area to the imaging area achieved was less than 50 ppm.
Original language | English (US) |
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Pages (from-to) | 315-318 |
Number of pages | 4 |
Journal | Fenxi Huaxue/ Chinese Journal of Analytical Chemistry |
Volume | 37 |
Issue number | 3 |
DOIs | |
State | Published - 2009 |
Externally published | Yes |
Keywords
- Egg
- Imaging
- Melamine
- Surface desorption atmospheric pressure chemical ionization
- Tandem mass spectrometry
ASJC Scopus subject areas
- Analytical Chemistry