ring down spectroscopy
A gas chromatograph for quantification of peroxycarboxylic nitric anhydrides calibrated by thermal dissociation cavity ring-down spectroscopy
... by gas chromatography (PAN-GC) coupled to electron cap- ture detection. Calibration of a PAN-GC remains a chal- lenge, because the response factors differ for each of the PANs, and because their synthesis in sufficiently ...
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Comprehensive laboratory and field testing of cavity ring-down spectroscopy analyzers measuring H 2O, CO2 , CH 4and CO
... Abstract. To develop an accurate measurement network of greenhouse gases, instruments in the field need to be sta- ble and precise and thus require infrequent calibrations and a low consumption of consumables. For about ...
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Cavity ring-down spectroscopy sensor for detection of hydrogen chloride
... practical advantage. Further, the smaller cell volume possi- ble in CRDS versus Herriot cells means our CRDS system uses a flow rate more than 10 times smaller than past Herriot cell work, allowing use of smaller and ...
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Negligible influence of livestock contaminants and sampling system on ammonia measurements with cavity ring-down spectroscopy
... In a few recent studies, cavity ring-down spectroscopy (CRDS) has been used to measure ammonia concentrations (Maasikmets et al., 2015; Sintermann et al., 2011) in agri- cultural settings. The CRDS ...
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High-precision measurements of nitrous oxide and methane in air with cavity ring-down spectroscopy at 7.6 µm
... ity ring-down spectroscopy (CRDS) (Banik et ...output spectroscopy (ICOS) (O’Keefe, 1998), and noise immune cavity enhanced optical hetero- dyne molecular spectroscopy (NICE-OHMS) ...
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Cavity ring-down spectroscopy sensor development for high-time-resolution measurements of gaseous elemental mercury in ambient air
... Cavity ring-down spectroscopy – overview of theory Pulsed cavity ring-down spectroscopy is an absorption tech- nique that uses high-reflectivity mirrors positioned at both ends ...
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High-Resolution Study of the O₂ A-Band using Frequency Stabilized Cavity Ring-Down Spectroscopy
... cavity ring-down spectroscopy (FS-CRDS) to measure lineshape parameters (line strengths, widths, pressure-induced shifts, and collisional narrowing) for the 18 ≤ J′ ≤ 32 of the ...
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Development and application of evanescent wave cavity ring down spectroscopy as a probe of biologically relevant interfaces
... the ring-down time from each transient was calculated with the fast Fourier transform method 1 using custom- written LabVIEW ...Typical ring-down times were between 50 ns and 800 ns. A typical ...
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Intercomparison of two cavity ring-down spectroscopy analyzers for atmospheric 13 CO 212 CO 2measurement
... Regarding the accuracy of IRIS instruments, Guillon et al. (2012) found that in the range 300–2000 ppm, the accu- racy of δ 13 C measured by DLT-100 was 2.7 ‰ for raw mea- surements and improved to 1.3 ‰ after ...
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Frequency Stabilized Cavity Ring Down Spectroscopy of O₂ and CO₂ to Support Atmospheric Remote Sensing
... the ring-down signals occurring in the photoreceiver and A/D systems, limits the precision with which the ring-down time constant can be ...
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Accurate measurements of carbon monoxide in humid air using the cavity ring-down spectroscopy (CRDS) technique
... The measurements of CO mole fractions are determined from the strength of its spec- tral absorption in the near-infrared region ( ∼ 1.57 µm) af- ter removing interferences from adjacent [r] ...
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System for 13 C–CO 2andx CO 2analysis of discrete gas samples by cavity ring-down spectroscopy
... Bottle measurement data of the standard air used as baseline for syringe sample measurements (NA1) and the gas standards used in method calibration (NA2 to LE2).. Values are the averages[r] ...
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High-accuracy continuous airborne measurements of greenhouse gases (CO 2and CH4 ) using the cavity ring-down spectroscopy (CRDS) technique
... In the CRDS technique, the gas sample is analyzed in a high- finesse optical cavity; the optical absorbance of the sample is determined by the light dissipation rate in the optical cavity, thus typically providing ...
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Calibrated high-precision 17 O-excess measurements using cavity ring-down spectroscopy with laser-current-tuned cavity resonance
... cavity ring-down laser absorption spectrometer that provides both high-precision and high-relative-accuracy measurements of 1 17 ...absorption spectroscopy isotope ra- tio analysis for all four main ...
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An intercomparison of HO 2measurements by fluorescence assay by gas expansion and cavity ring-down spectroscopy within HIRAC (Highly Instrumented Reactor for Atmospheric Chemistry)
... the ring-down ...next ring- down ...acquired ring-down events with an exponential function and can run in two modes: fixed wavelength and ...all ring-down events as ...
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Development and application of evanescent wave cavity ring down spectroscopy for studies of electrochemical and interfacial processes
... 0.2 cm 3 of PLL (1 mg cm -3 in ultra pure water) was contacted for 20 min with clean fused silica prisms, leading to PLL deposition by drop coating. After deposition, the prism was rinsed with ultrapure water and dried ...
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Application of continuous-wave cavity ring-down spectroscopy to laminar flames
... 32 ring-down events were taken for each wavelength increment of the 1535 nm laser and also for the 1547 nm mea- ...individual ring-down traces has been measured to be ...average ...
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Simultaneous measurement of NO and NO2 by a dual-channel cavity ring-down spectroscopy technique
... A blue diode laser is used as the light source and the wave- length of the laser is monitored in real time by a spectrom- eter. The output of the diode laser, with a centre wavelength at 403.64 nm and a line width of 0.5 ...
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Cavity ring-down UV spectroscopy of the C2Σ+-X2Π electronic transition of CH
... A pulsed high voltage discharge molecular source was used to create a planar, supersonically expanding plasma that proved to be a good source of rotationally and vibrationally highly excited CH radicals. The high ...
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Study of a periodic spectral fluctuation existing in a fibered optical feedback cavity-enhanced absorption spectroscopy (OF-CEAS)
... absorption spectroscopy using high finesse optical resonant cavity, representatively, cavity- enhanced absorption spectroscopy (CEAS) and cavity ring- down spectroscopy (CRDS) [5], some ...
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