Gas phase study of the reactivity of optical coating materials with hydrocarbons using a compact EUV laser

Heinbuch,; Dong, Shen; Rocca,; Bernstein,

doi:10.1109/cleo.2008.4552152

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…[37][38][39][40][41][42][43][44] This technique was extended to study organic compounds using laser desorption in combination with REMPI. [37][38][39][40][41][42][43][44] This technique was extended to study organic compounds using laser desorption in combination with REMPI.…”

Section: Introductionmentioning

confidence: 99%

Laser ablation with resonance-enhanced multiphoton ionization time-of-flight mass spectrometry for determining aromatic lignin volatilization products from biomass

Mukarakate

Scheer

Robichaud

et al. 2011

Review of Scientific Instruments

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We have designed and developed a laser ablation∕pulsed sample introduction∕mass spectrometry platform that integrates pyrolysis (py) and∕or laser ablation (LA) with resonance-enhanced multiphoton ionization (REMPI) reflectron time-of-flight mass spectrometry (TOFMS). Using this apparatus, we measured lignin volatilization products of untreated biomass materials. Biomass vapors are produced by either a custom-built hot stage pyrolysis reactor or laser ablation using the third harmonic of an Nd:YAG laser (355 nm). The resulting vapors are entrained in a free jet expansion of He, then skimmed and introduced into an ionization region. One color resonance-enhanced multiphoton ionization (1+1 REMPI) is used, resulting in highly selective detection of lignin subunits from complex vapors of biomass materials. The spectra obtained by py-REMPI-TOFMS and LA-REMPI-TOFMS display high selectivity and decreased fragmentation compared to spectra recorded by an electron impact ionization molecular beam mass spectrometer (EI-MBMS). The laser ablation method demonstrates the ability to selectively isolate and volatilize specific tissues within the same plant material and then detect lignin-based products from the vapors with enhanced sensitivity. The identification of select products observed in the LA-REMPI-TOFMS experiment is confirmed by comparing their REMPI wavelength scans with that of known standards.

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