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

Industrial Health
Maromu YamadaIsamu Ogura

Abstract

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-TiO(2) 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...Continue Reading

Citations

May 12, 2019·Indoor Air·Torkan FazliBrent Stephens
Dec 5, 2019·Journal of Occupational Medicine and Toxicology·Rikke Bramming Jørgensen
Aug 21, 2019·Environmental Monitoring and Assessment·Sunil K YadavTirthankar Banerjee

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NanoScan
SMPS
Aerosol Instrument Manager

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