2017
DOI: 10.1021/acs.analchem.6b03932
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Direct Analysis of Xanthine Stimulants in Archaeological Vessels by Laser Desorption Resonance Enhanced Multiphoton Ionization

Abstract: 13Resonance enhanced multiphoton ionization spectroscopy (REMPI) generates simultaneous 14 vibronic spectroscopy and fragment free mass spectrometry to identify molecules within a 15 complex matrix. We combined laser desorption with REMPI spectroscopy to study organic 16 residues within pottery sherds from Maya vessels (600-900 CE) and Missisippian Mississippian 17 vessels (1100-1200 CE), successfully detecting three molecular markers, caffeine, theobromine 18 and theophylline, associated with the use of cacao… Show more

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Cited by 2 publications
(1 citation statement)
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“…REMPI-TOFMS is applied in a wide variety of fields, such as spectroscopic studies and environmental monitoring. [21][22][23][24][25][26][27][28] This method is normally used for the detection of samples in the gas phase with fewer applications to liquid samples. 29 In order to apply the unique features of this method to the measurement of an emulsion, we developed a sample introduction technique for REMPI-TOFMS that is based on the use of a pair of concentric capillaries.…”
Section: Introductionmentioning
confidence: 99%
“…REMPI-TOFMS is applied in a wide variety of fields, such as spectroscopic studies and environmental monitoring. [21][22][23][24][25][26][27][28] This method is normally used for the detection of samples in the gas phase with fewer applications to liquid samples. 29 In order to apply the unique features of this method to the measurement of an emulsion, we developed a sample introduction technique for REMPI-TOFMS that is based on the use of a pair of concentric capillaries.…”
Section: Introductionmentioning
confidence: 99%