A device for real-time monitoring of oil-in-water andsuspended solids based on thermal lens spectrometryand light scattering

LACAPMESURE, AXEL; MARTINEZ, OSCAR EDUARDO; DARÍO KUNIK

APPLIED OPTICS

OPTICAL SOC AMER

Lugar: Washington; Año: 2020

0003-6935

lens spectroscopy and forward light scattering is presented. The technique measures the concentrationof dissolved hydrocarbons and simultaneously detects single oil droplets and suspended particles separately.The device was tested with injection water from an on-field water treatment plant, and hydrocarbonconcentrations were measured with a precision better than 5% in the range up to 100ppm, reachingresolutions as low as 0.03ppm. Particle detection was tested on model samples of dyed and undyedpolystyrene spheres acting as absorption and scattering centers, which simulated oil droplets and suspendedsolids respectively. We show that particles of different sizes are distinguished by the magnitudeof the perturbations introduced in the signals, also their concentrations can be measured independentlyof dissolved components.