Alpha 2 platinum atr

The Coatings Aerosol Resuspension System (CARES) was used to generate TiO₂ containing paint dust using an orbital sander and 120 grit size sandpaper in a polyvinylchloride glove box chamber (115 cm × 60 cm × 60 cm) (Lancs Industries, Kirkland, WA, USA) [13 (link)]. A wide particle spectrometer (WPS) (Model 1000XP, MSP Corp., Shoreview, MN, USA) and a condensation particle counter (CPC) (Model 3771, TSI Inc., Shoreview, MN, USA) were used to measure the particle number concentration and size distribution. Paint dust samples were collected on 13-mm cellulose filters and 47-mm Teflon filters (Pall Corp., Port Washington, NY, USA) at a 1.0 and 5.0 L/min flow rate, respectively, for chemical and imaging analysis, respectively. Chemical analysis was done by attenuated total reflectance Fourier-transform infrared spectrometer (ATR-FTIR; ALPHA II Platinum ATR, Bruker corp., Billerica, MA, USA) with a single reflection diamond ATR (range: 400–4000 cm⁻¹, with a resolution of 2 cm⁻¹). Morphological analysis was performed by scanning electron microscope (SEM; 650 FEG, Eindhoven, The Netherlands). The SEM was used at a low pressure setting of 0.53 torr, working distance of 10 mm, and accelerating voltage of 10 kV. Samples were examined at 5000× and 10,000× magnifications. The elemental composition was determined using the integrated energy-dispersive X-ray (EDX) at 5000× magnification.