Work Environment Measurements of Nanoparticles in the Nanoparticle-handling-process Using Portable Type Particle Sizer Spectrometers

Iwasawa, Satoko; Tanaka, Shigeru; Miyauchi, Hiroyuki; Minozoe, Aoi; Nakaza, Masahiro; Takebayashi, Toru

doi:10.1539/sangyoeisei.c13001

Cited by 1 publication

(2 citation statements)

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“…The NanoScan is portable and battery-operated. These advantages potentially facilitate the measurement of the size distribution of nanometer to submicrometer particles and a combination of the OPS and the NanoScan has already been used for environmental measurements in workplaces handling nanomaterials 8 ) .…”

Section: Methodsmentioning

confidence: 99%

“…Polydispersed nano-TiO 2 aerosol particles were used for evaluating the performance of the aerosol sizers. The aerosols were generated from the nano-TiO 2 P25 powder using a vortex shaker 8 , 9 , 10 , 11 , 12 ) and aerosolized as follows. One cm 3 of the powder was placed in a glass test tube and agitated using a vortex shaker at a constant rotational speed (2,750 rpm), after which the suspended particles were delivered to the aerosol sizers by HEPA-filtered air.…”

Section: Methodsmentioning

confidence: 99%

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Performance evaluation of newly developed portable aerosol sizers used for nanomaterial aerosol measurements

2015

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Nanomaterial particles exhibit a wide range of sizes through the formation of agglomerates/aggregates. To assess nanomaterial exposure in the workplace, accurate measurements of particle concentration and size distribution are needed. In this study, we evaluated the performance of two recently commercialized instruments: a portable scanning mobility particle sizer (SMPS) (NanoScan, TSI Inc.), which measures particle size distribution between 10 and 420 nm and an optical particle sizer (OPS, TSI Inc.), which measures particle size distribution between 300 and 10,000 nm. We compared the data measured by these instruments to conventional instruments (i.e., a widely used laboratory SMPS and an optical particle counter (OPC)) using nano-TiO2 powder as test aerosol particles. The results showed obvious differences in the size distributions between the new and old SMPSs. A possible reason for the differences is that the cyclone inlet of the new SMPS (NanoScan) acted as a disperser of the weakly agglomerated particles and consequently the concentration increased through the breakup of the agglomerates. On the other hand, the particle concentration and size distributions measured by the OPS were similar to the OPC. When indoor aerosol particles were measured, the size distribution measured by the NanoScan was similar to the laboratory SMPS.

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Section: Methodsmentioning

confidence: 99%