Development of an approach to correcting MicroPEM baseline drift.

ABSTRACT:

Background

Fine particulate matter (PM_2.5) is associated with various adverse health outcomes. The MicroPEM (RTI, NC), a miniaturized real-time portable particulate sensor with an integrated filter for collecting particles, has been widely used for personal PM_2.5 exposure assessment. Five-day deployments were targeted on a total of 142 deployments (personal or residential) to obtain real-time PM_2.5 levels from children living in New York City and Baltimore. Among these 142 deployments, 79 applied high-efficiency particulate air (HEPA) filters in the field at the beginning and end of each deployment to adjust the zero level of the nephelometer. However, unacceptable baseline drift was observed in a large fraction (> 40%) of acquisitions in this study

SUBMITTER: Zhang T 

PROVIDER: S-EPMC5911226 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature