Application of lasers in precision analytical measurements (review)

Butkevich, V. I.; Privalov, V. E.

doi:10.1007/bf00657256

Cited by 1 publication

(1 citation statement)

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“…To address this issue, we propose laser absorption spectroscopy (LAS) as a long established, sensitive, selective, and transparent approach [12], which has also been successfully applied as absolute method in metrology [13]. With the development of mid-IR semiconductor laser sources, such as quantum cascade lasers (QCL) or interband cascade lasers (ICL), it became possible to take full advantage of the strongest, fundamental absorption features of most molecules in compact and field-deployable setups [14].…”

Section: Introductionmentioning

confidence: 99%

High-precision ethanol measurement by mid-IR laser absorption spectroscopy for metrological applications

et al. 2019

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We report on the development and validation of a compact laser instrument using mid-IR direct absorption spectroscopy (DAS) for high-precision measurements of ethanol in breath-like air mixtures. Leveraging the intermittent continuous wave (iCW) driving for conventional narrow-band distributed feedback (DFB) quantum cascade laser (QCL) emitting around 9.3 µm and using a 25 m path length multiple-pass absorption cell at reduced pressure, a precision of 9 ppb (amount fraction, nmol mol −1) at 60 s integration time is achieved even in the presence of 5% of H 2 O and CO 2. Thus, the instrument is well suitable for metrological studies to investigate observed, but yet unquantified, discrepancies between different breath alcohol reference-generation methods. The approach can be generalized and applied for other organic molecules in a wide range of applications.

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Section: Introductionmentioning

confidence: 99%