Near ambient pressure-x-ray photoelectron spectroscopy (NAP-XPS) is a less traditional form of XPS that allows samples to be analyzed at relatively high pressures, i.e., at ca. 2500 Pa, or higher in some cases. With NAP-XPS, XPS can probe moderately volatile liquids, biological samples, porous materials, and/or polymeric materials that outgas significantly. In this submission, we show an NAP-XPS survey spectrum, and also O 1s and C 1s narrow scans, of a commercial soft drink, Coca-Cola. Clearly this is a material that could not be analyzed at moderate pressures by conventional XPS. The C 1s narrow scan is fit to five synthetic components. The O 1s narrow scan shows strong contributions from both liquid and gas phase water. A small N 1s signal in the survey spectrum is attributed to background nitrogen. The shape of the uniqueness plot corresponding to the C 1s fit suggests that the fit parameters are statistically significant.
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December 2019
Research Article|
August 28 2019
Coca-Cola, by near-ambient pressure XPS
Dhruv Shah;
Dhruv Shah
1
Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN
, Provo, Utah 84602
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Cody V. Cushman;
Cody V. Cushman
1
Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN
, Provo, Utah 84602
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Stephan Bahr;
Stephan Bahr
2
SPECS Surface Nano Analysis GmbH
, Voltastrasse 5, 13355 Berlin, Germany
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Paul Dietrich
;
Paul Dietrich
2
SPECS Surface Nano Analysis GmbH
, Voltastrasse 5, 13355 Berlin, Germany
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Michael Meyer;
Michael Meyer
2
SPECS Surface Nano Analysis GmbH
, Voltastrasse 5, 13355 Berlin, Germany
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Andreas Thißen;
Andreas Thißen
2
SPECS Surface Nano Analysis GmbH
, Voltastrasse 5, 13355 Berlin, Germany
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Matthew R. Linford
Matthew R. Linford
a)
1
Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN
, Provo, Utah 84602
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Dhruv Shah
1
Cody V. Cushman
1
Stephan Bahr
2
Paul Dietrich
2
Michael Meyer
2
Andreas Thißen
2
Matthew R. Linford
1,a)
1
Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN
, Provo, Utah 84602
2
SPECS Surface Nano Analysis GmbH
, Voltastrasse 5, 13355 Berlin, Germany
a)
Electronic mail: [email protected]
Surf. Sci. Spectra 26, 024005 (2019)
Article history
Received:
May 22 2019
Accepted:
July 19 2019
Citation
Dhruv Shah, Cody V. Cushman, Stephan Bahr, Paul Dietrich, Michael Meyer, Andreas Thißen, Matthew R. Linford; Coca-Cola, by near-ambient pressure XPS. Surf. Sci. Spectra 1 December 2019; 26 (2): 024005. https://doi.org/10.1116/1.5111037
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