Imaging melamine in Egg samples by surface desorption atmospheric pressure chemical ionization tandem mass spectrometry

Shui Ping Yang, Huan Wen Chen, Yu Ling Yang, Bin Hu, Xie Zhang, Yu Fen Zhou, Li Li Zhang, Hai Wei Gu

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

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 languageEnglish (US)
Pages (from-to)315-318
Number of pages4
JournalFenxi Huaxue/ Chinese Journal of Analytical Chemistry
Volume37
Issue number3
DOIs
StatePublished - Jan 1 2009
Externally publishedYes

Keywords

  • Egg
  • Imaging
  • Melamine
  • Surface desorption atmospheric pressure chemical ionization
  • Tandem mass spectrometry

ASJC Scopus subject areas

  • Analytical Chemistry

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