Note: Reliable, robust measurement system for trace moisture in gas at parts-per-trillion levels using cavity ring-down spectroscopy.

作者: Hisashi Abe , Daniel Lisak , Agata Cygan , Roman Ciuryło , None

DOI: 10.1063/1.4934976

关键词: System of measurementMoistureAnalytical chemistryParts-per notationResidual moistureMoisture measurementTrace (linear algebra)Cavity ring-down spectroscopyMaterials scienceSpectroscopy

摘要: We report a simple, robust cavity ring-down spectroscopy system to reliably measure trace moisture in gases at parts-per-trillion (ppt) levels. The performance of the was evaluated on basis experiments performed manner traceable International System Units. obtained result good agreement with primary trace-moisture standard 12 nmol/mol (12 ppb) N2 amount-of-substance fraction. Measurement capability residual high-purity dry ∼130 pmol/mol (130 ppt) demonstrated, and background noise 5.3 × 10−12 cm−1 attained, corresponding minimum detectable H2O 5 (5 ppt).

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