Mass distribution measurements with an aerosol centrifuge with quartz sensors as mass detectors

Stöber, Werner; Mönig, F. J.; Flachsbart, Hermann; Schwarzer, Norbert

doi:10.1016/0021-8502(79)90106-x

Cited by 2 publications

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“…In order to avoid the drawbacks of bulky and miniaturized instruments, QCM-based aerosol sensors have been developed, and they are considered an appropriate candidate for the measurement of mass concentration of PM [10], [11] because the resonant frequency shift is directly proportional to the mass stuck to the oscillating (electrode) region of a QCM. In addition, the QCM possesses high sensitivity, rapid response, low cost as well as portability for on-site measurements, and have been easily integrated into aerosol instruments for both mass concentration [9], [10], [12]- [19], and mass distribution [20]- [23].…”

Section: Introductionmentioning

confidence: 99%

Measurement of PM_2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

et al. 2019

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Particulate matter (PM) is one of the most critical air pollutants, and various instruments have been developed to measure PM mass concentration. Of these, quartz crystal microbalance (QCM) based instruments have received much attention. However, these instruments are subject to significant drawbacks: particle bounce due to poor adhesion, need for frequent cleanings of the crystal electrode, and non-uniform distribution of collected particles. In this study, we present an electrostatic particle concentrator (EPC)-based QCM (qEPC) instrument capable of measuring the mass concentration of PM 2.5 (PM smaller than 2.5 µm), while avoiding the drawbacks. Experimental measurements showed high collection efficiencies (∼99% at 1.2 liters/min), highly uniform particle distributions for long sampling periods (up to 120 min at 50 µg/m 3 ), and high mass concentration sensitivity [0.068(Hz/min)/(µg/m 3 )]. The enhanced uniformity of particle deposition profiles and mass concentration sensitivity were made possible by the unique flow and electrical design of the qEPC instrument.

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Section: Introductionmentioning

confidence: 99%

Measurement of PM_2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

et al. 2019

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“…One notable example is the use of the quartz crystal microbalance as the collecting surface of a cascade impactor to obtain a near-real-time measurement of aerosol mass distribution measurement. Two commercial quartz crystal sensors equipped cascade impactors have been developed [54, 1121. Recently, Stober et al [113] also mounted the sensors in a spiral aerosol centrifuge to measure aerosol mass distribution. Fissan and Marple [I 141 incorporate the use of quartz crystal sensor in the micro-orifice impactor for mass distribution measurement down to 0.05 pm.…”

Section: Electrical Aerosol Analyzers the High Electric Mobility Of S...mentioning

confidence: 99%

Advances in instrumentation for atmospheric aerosol measurement

Pui

Liu

1988

Phys. Scr.

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Instruments for airborne particle sampling and measurement are important tools for the study of particulate air contaminants. As such they are important in air quality, air pollution and industrial hygiene studies. Particle measuring instruments are important also for various industrial processes, such as clean room monitoring and contaminant measurement in clean process gases used in semiconductor manufacturing. This paper reviews the advances in particle measuring and sampling instruments, with particular emphasis on instruments for atmospheric studies. Devices for particle generation needed for instrument calibration and experimental purposes are also covered in this review. instruments Manual sampling devicesManual sampling devices are needed to collect atmospheric particles for subsequent gravimetric and/or chemical analysis. The collection is usually done with a filter sampler to give an integrated sample and a time averaged concentration measurement. A relatively low sampling flow rate of a few

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Mass distribution measurements with an aerosol centrifuge with quartz sensors as mass detectors

Cited by 2 publications

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Measurement of PM_2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

Measurement of PM_2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

Advances in instrumentation for atmospheric aerosol measurement

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Mass distribution measurements with an aerosol centrifuge with quartz sensors as mass detectors

Cited by 2 publications

References 0 publications

Measurement of PM2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

Measurement of PM2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

Advances in instrumentation for atmospheric aerosol measurement

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Product

Resources

About

Measurement of PM_2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance

Measurement of PM_2.5 Mass Concentration Using an Electrostatic Particle Concentrator-Based Quartz Crystal Microbalance