Filter-based differential hygroscopicity analyzer of aerosol particles

Mikhailov, Eugene; Merkulov, V. V.; Vlasenko, S. S.; Ryshkevich, T. I.; Pöschl, Ulrich

doi:10.1134/s0001433811060107

Cited by 17 publications

(13 citation statements)

References 38 publications

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“…SEM analyses showed that under these conditions the average distance between particles was larger than the expected diameter growth factors (G D = 2-10 for NaCl at RH = 80-99 %) (Mikhailov et al, 2011). Moreover, the hydration and dehydration experiments were performed in multiple cycles that went up to different maximum RH values (60 %, 80 %, 99 %) and yielded consistent results, indicating that coagulation at high RH had no significant effect.…”

Section: Water Uptake Measurementsmentioning

confidence: 73%

“…It can be directly used for the analysis of water uptake experiments measuring the mass of absorbed water: electrodynamic balance (EDB), particle mass analyzer (Khalizov et al, 2009), microbalance (Hatch et al, 2008), micro-Raman spectroscopy (Yeung and Chan, 2008), and filter-based techniques (Mikhailov et al, 2011;Speer et al, 2003;Lee and Hsu, 2000).…”

Section: Discussionmentioning

confidence: 99%

“…The filter loadings of the atmospheric samples are listed in Table 2, the loadings of the NaCl and AS reference samples were 0.132 mg and 0.130 mg, respectively. Details of the experimental setup and calibration are described elsewhere (Mikhailov et al, 2011); the operating principles are only briefly outlined here.…”

Section: Water Uptake Measurementsmentioning

confidence: 99%

“…The mass of water taken up by the aerosol particles on the loaded filter aliquot was determined by a differential katharometer and recorded by an analog-digital converter and a personal computer. The measurement uncertainties depend on the weighing accuracy of dry particle mass (aerosol loading), absorbed water mass (aerosol hygroscopicity), and water vapor measurement precision of the katharometer (Mikhailov et al, 2011). The experimental conditions in the measurements cells were close to ambient temperature and pressure (∼ 295 K, ∼ 1 atm).…”

Section: Water Uptake Measurementsmentioning

confidence: 99%

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Mass-based hygroscopicity parameter interaction model and measurement of atmospheric aerosol water uptake

et al. 2013

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Abstract. In this study we derive and apply a mass-based hygroscopicity parameter interaction model for efficient description of concentration-dependent water uptake by atmospheric aerosol particles with complex chemical composition. The model approach builds on the single hygroscopicity parameter model of Petters and Kreidenweis (2007). We introduce an observable mass-based hygroscopicity parameter κ m which can be deconvoluted into a dilute hygroscopicity parameter (κ 0 m ) and additional self-and cross-interaction parameters describing non-ideal solution behavior and concentration dependencies of single-and multi-component systems.For reference aerosol samples of sodium chloride and ammonium sulfate, the κ m -interaction model (KIM) captures the experimentally observed concentration and humidity dependence of the hygroscopicity parameter and is in good agreement with an accurate reference model based on the Pitzer ion-interaction approach (Aerosol Inorganic Model, AIM). Experimental results for pure organic particles (malonic acid, levoglucosan) and for mixed organic-inorganic particles (malonic acid -ammonium sulfate) are also well reproduced by KIM, taking into account apparent or equilibrium solubilities for stepwise or gradual deliquescence and efflorescence transitions.The mixed organic-inorganic particles as well as atmospheric aerosol samples exhibit three distinctly different regimes of hygroscopicity: (I) a quasi-eutonic deliquescence & efflorescence regime at low-humidity where substances are just partly dissolved and exist also in a non-dissolved phase, (II) a gradual deliquescence & efflorescence regime at intermediate humidity where different solutes undergo gradual dissolution or solidification in the aqueous phase; and (III) a dilute regime at high humidity where the solutes are fully dissolved approaching their dilute hygroscopicity.For atmospheric aerosol samples collected from boreal rural air and from pristine tropical rainforest air (secondary organic aerosol) we present first mass-based measurements of water uptake over a wide range of relative humidity (1-99.4 %) obtained with a new filter-based differential hygroscopicity analyzer (FDHA) technique. For these samples the concentration dependence of κ m can be described by a simple KIM model equation based on observable mass growth factors and a total of only six fit parameters summarizing the combined effects of the dilute hygroscopicity parameters, self-and cross-interaction parameters, and solubilities of all involved chemical components. One of the fit parameters represents κ 0 m and can be used to predict critical dry diameters for the activation of cloud condensation nuclei (CCN) as a function of water vapor supersaturation according to Köhler theory. For sodium chloride and ammonium sulfate reference particles as well as for pristine rainforest aerosols consisting mostly of secondary organic matter, we obtained good agreement between the KIM predictions and measurement data of CCN activation.The application of KIM and mass-based me...

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Section: Water Uptake Measurementsmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Water Uptake Measurementsmentioning

confidence: 99%

Section: Water Uptake Measurementsmentioning

confidence: 99%

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Mass-based hygroscopicity parameter interaction model and measurement of atmospheric aerosol water uptake

et al. 2013

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“…This technique enables high-precision measurements of the mass growth factor in hydration and dehydration mode, but it is applicable only to supermicron (typically 5-25 µm) particles and can be used only in laboratory conditions. The other mass-based techniques employ aerosol sampled on filters (Lee and Hsu, 1998;Mikhailov et al, 2011). This approach is suitable for measurements of ambient aerosol, but only in offline mode, and therefore, the loaded filters require careful handling to avoid possible particle mass loss between sampling and measuring.…”

Section: Introductionmentioning

confidence: 99%

Tandem configuration of differential mobility and centrifugal particle mass analysers for investigating aerosol hygroscopic properties

Vlasenko

Pöschl

et al. 2017

Atmos. Meas. Tech.

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Abstract. A tandem arrangement of Differential MobilityAnalyser and Humidified Centrifugal Particle Mass Analyser (DMA-HCPMA) was developed to measure the deliquescence and efflorescence thresholds and the water uptake of submicron particles over the relative humidity (RH) range from 10 to 95 %. The hygroscopic growth curves obtained for ammonium sulfate and sodium chloride test aerosols are consistent with thermodynamic model predictions and literature data. The DMA-HCPMA system was applied to measure the hygroscopic properties of urban aerosol particles, and the kappa mass interaction model (KIM) was used to characterize and parameterize the concentration-dependent water uptake observed in the 50-95 % RH range. For DMAselected 160 nm dry particles (modal mass of 3.5 fg), we obtained a volume-based hygroscopicity parameter, κ v ≈ 0.2, which is consistent with literature data for freshly emitted urban aerosols.Overall, our results show that the DMA-HCPMA system can be used to measure size-resolved mass growth factors of atmospheric aerosol particles upon hydration and dehydration up to 95 % RH. Direct measurements of particle mass avoid the typical complications associated with the commonly used mobility-diameter-based HTDMA technique (mainly due to poorly defined or unknown morphology and density).

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Quantifying the impacts of PM2.5 constituents and relative humidity on visibility impairment in a suburban area of eastern Asia using long-term in-situ measurements

Ting

Young

Lin

et al. 2022

Science of The Total Environment

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Filter-based differential hygroscopicity analyzer of aerosol particles

Cited by 17 publications

References 38 publications

Mass-based hygroscopicity parameter interaction model and measurement of atmospheric aerosol water uptake

Mass-based hygroscopicity parameter interaction model and measurement of atmospheric aerosol water uptake

Tandem configuration of differential mobility and centrifugal particle mass analysers for investigating aerosol hygroscopic properties

Quantifying the impacts of PM2.5 constituents and relative humidity on visibility impairment in a suburban area of eastern Asia using long-term in-situ measurements

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