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 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 ...
Continuous micro flow monitoring method for total mercury at sub-ppb level in wastewater and other waters using cold vapor atomic absorption spectrometry Home > Section > Chapter Goto, M.; Munaf, E.; Ishii, D. Fresenius' Zeitschrift fur Analytische Chemie 332(7): 745-749...
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 ...
Moreover, the sensors showed good response towards NO2 down to ppb level (Rg/Ra = 10.2 to 100 ppb), a very low theoretical detection limit of 3.5... Y Wang,L Yao,L Xu,... - 《Sensors & Actuators B Chemical》 被引量: 0发表: 2021年 Detection of NO2 down to ppb levels using ...
fast responsesub-ppb level detectioncharge transfertrinitrotolueneWe present sub﹑pt level detection of explosive trinitrotoluene by constructing a fast‐response electrochemical sensor using nitrogenized porous carbon spheres (NPCS). NPCS with nitrogen doping and amino functionalization accelerates charge ...
All organic semiconductor-based NO<sub>2</sub> sensors fail to reach such a level. In this work, using an ion-in-conjugation inspired-polymer (poly(3,3'-diaminobenzidine-squarine, noted as PDBS) as the sensory material, NO<sub>2</sub> can be detected as low as 1 ppb, which is ...
In this study, the efficiency of inorganic sulfur reductants (ISRs) for the Cr(VI) removal from drinking water at sub-ppb level was evaluated. Particularly, NaHSO3, Na2S2O3, Na2S2O4, Na2S2O5, and Na2S were examined at doses up to 50mg S/L, which is equivalent to an increase in sulfate ...
Such processes require ultrahigh-purity process gases because the presence of even ppm-level impurities can severely affect the product quality and/or yield [550]. Typical process gases include N2, Ar, and He, with the maximum allowable contamination of impurities, such as moisture and oxygen, ...