Measuring masses of single bacterial whole cells with a quadrupole ion trap
Journal of the American Chemical Society, ISSN: 0002-7863, Vol: 126, Issue: 38, Page: 11766-11767
2004
- 55Citations
- 35Captures
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Metrics Details
- Citations55
- Citation Indexes55
- 55
- CrossRef42
- Captures35
- Readers35
- 35
Article Description
A novel method has been developed to precisely measure the masses of single bacterial whole cells using a quadrupole ion trap as an electrodynamic balance. The bacterial cells were introduced into the ion trap by matrix-assisted laser desorption/ionization, confined in space by audio frequency ac fields, and detected by elastic light scattering. Mass measurement accuracy approaching 0.1% was achieved for Escherichia coli K-12 with a mass distribution of ±3% from 60 repetitive measurements of the particles and their clusters. This is the first high-precision mass measurement reported for any intact microorganisms with masses greater than 1 × 1010 Da. The method opens new avenues for high-precision mass measurement of single microbial particles and offers an alternative approach for rapid identification of microorganisms by mass spectrometry. Copyright © 2003 American Chemical Society.
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