An instrument for the rapid quantification of PM-bound ROS: the Particle Into Nitroxide Quencher (PINQ)

Autor: R. A. Brown, S. Stevanovic, S. Bottle, Z. D. Ristovski
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Atmospheric Measurement Techniques, Vol 12, Pp 2387-2401 (2019)
Druh dokumentu: article
ISSN: 1867-1381
1867-8548
DOI: 10.5194/amt-12-2387-2019
Popis: Reactive oxygen species (ROS) present on or generated by particulate matter (PM) have been implicated in PM-induced health effects. Methodologies to quantify ROS concentrations vary widely, both in detection and collection methods. However, there is currently an increasing emphasis on rapid collection and measurement due to observations of short half-life ROS. To address this problem, this paper details the design and characterization of a novel instrument for the measurement of PM-bound ROS named the Particle Into Nitroxide Quencher (PINQ). This instrument combines the 9,10-bis (phenylethynyl) anthracene-nitroxide (BPEAnit) ROS assay in conjunction with a purpose-built aerosol collection device, the insoluble aerosol collector (IAC). The IAC continuously collects PM regardless of size or chemistry directly into a liquid sample with a collection efficiency of > 0.97 and a cut-off size of −3 in equivalent BPEAnit-Me concentration per volume of air. This high sample time resolution and sensitivity is achieved due to a combination of the highly concentrated IAC liquid sample, minimized liquid sample volume, and the rapid reaction and stability of the BPEAnit probe.
Databáze: Directory of Open Access Journals
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje