Sub-ppb level detection of nitrogen dioxide based on an optimized H-type longitudinal acoustic resonator and a lock-in white-light interferometry demodulation algorithmNO2 detectionH-type photoacoustic cellFiber-optic acoustic sensorPhotoacoustic spectroscopy...
et al.Laser photoacoustic spectroscopy: a powerful tool for measurement of trace gases of biological interest at sub-ppb level.Molecular Crystals and Liquid Crystals. 2004Dumitra? Dc,Puiu A,Cernat R. et al.Laser photoacoustic spectroscopy: a powerful tool for measurement of trace gases of ...
In addition, the minimum detection level of the fabricated MEMS gas sensor was 10 ppb for the HCHO gas. And the measured output voltage was about 0.94 V for 10 ppb HCHO gas concentration. The noise level of the fabricated MEMS gas sensor was about 50 mV. The response and recovery times ...
Detecting Volatile Organic Compounds in the ppb range with platinum-gate SiC-Field Effect Transistors Indoor air qualitytrace levelbenzenenaphthaleneformaldehydelinear discriminant analysisIn this paper, the use of a platinum gate gas-sensitive SiC field-effect ... C Bur,ME Andersson,AL Spetz,... -...
Recent progress on infrared photoacoustic spectroscopy techniques 2011, Applied Spectroscopy Reviews Ammonia trace measurements at ppb level based on near-IR photoacoustic spectroscopy 2006, Applied Physics B: Lasers and Optics View all citing articles on ScopusView full text ...
Article: Continuous micro flow monitoring method for total mercury at sub-ppb level in wastewater and other waters using cold vapor atomic absorpti
The maximum contaminant level (MCL) is 10 ppb, even though considering the current knowledge regarding the estimated lung and bladder cancer risk would require MCL to be reduced to 0.5 ppb [13]. Sensitivity criteria set by these facts are sufficiently fulfilled by several techniques such ...
In heat exchanger fluid matrices containing 1000 ppm bore and 2 ppm lithium, only Fe(II) cation was detected among the three cations of interest at the 1 ppb level using the present method, and its LOD was about ten times higher, due to the lower loading rate during electrokinetic ...
Highly sensitive QEPAS sensor for sub-ppb N2O detection using a compact butterfly-packaged quantum cascade laser We report a mid-infrared quartz-enhanced photoacoustic sensor for highly sensitive nitrous oxide (N2O) detection using a 4.56 m quantum cascade laser (QCL)... M Yang,Z Wang,H Sun,...
Hence, using such high reflectivity mirrors, it may be possible to reliably measure trace moisture in gases even at sub-ppb levels, which is expected to become necessary in the semiconductor and high-barrier film industries in the future. However, it becomes more difficult to transmit the laser...