Details

Autor(en) / Beteiligte

• LeBouf, Ryan F
• Miller, Arthur L
• Stipe, Christopher
• Brown, Jonathan
• Murphy, Nate
• Stefaniak, Aleksandr B

Titel

Comparison of field portable measurements of ultrafine TiO2: X-ray fluorescence, laser-induced breakdown spectroscopy, and Fourier-transform infrared spectroscopy

Ist Teil von

• Environmental science--processes & impacts, 2013-06, Vol.15 (6), p.1191-1198

Ort / Verlag

England

Erscheinungsjahr

2013

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Laboratory measurements of ultrafine titanium dioxide (TiO 2 ) particulate matter loaded on filters were made using three field portable methods (X-ray fluorescence (XRF), laser-induced breakdown spectroscopy (LIBS), and Fourier-transform infrared (FTIR) spectroscopy) to assess their potential for determining end-of-shift exposure. Ultrafine TiO 2 particles were aerosolized and collected onto 37 mm polycarbonate track-etched (PCTE) filters in the range of 3 to 578 g titanium (Ti). Limit of detection (LOD), limit of quantification (LOQ), and calibration fit were determined for each measurement method. The LOD's were 11.8, 0.032, and 108 g Ti per filter, for XRF, LIBS, and FTIR, respectively and the LOQ's were 39.2, 0.11, and 361 g Ti per filter, respectively. The XRF calibration curve was linear over the widest dynamic range, up to the maximum loading tested (578 g Ti per filter). LIBS was more sensitive but, due to the sample preparation method, the highest loaded filter measurable was 252 g Ti per filter. XRF and LIBS had good predictability measured by regressing the predicted mass to the gravimetric mass on the filter. XRF and LIBS produced overestimations of 4% and 2%, respectively, with coefficients of determination ( R 2 ) of 0.995 and 0.998. FTIR measurements were less dependable due to interference from the PCTE filter media and overestimated mass by 2% with an R 2 of 0.831. This work compared the measurement of ultrafine titanium dioxide on filters using three techniques.