I sprayed my samples by nebulizing/atomizing a precursor solution of InCl3 salt dissolved in ethanol solvent. I would like to know the size of the aerosol droplet. Is there a way of calculating this maybe from the concentration of the precursor or some other parameter, because I do not have a device to measure this parameter directly?
You can calculate aerosol droplet size. If you are using ultrasonic atomization, check the paper "KONA Powder and Particle Journal No.29 (2011), 134-140."
Calculation of droplet size requires information on the nebulizer. A nebulizer produces a range of sizes. Some nebulizers are shaped to restrict some sizes. You will need flow rate, viscosity of solution, and concentration of solute. How accurate a calculation is required? Are you interested in droplet size before drying or the size of the dried particle? Some calculations are quite involved, so some detail is necessary before suggesting a calculation method.
Is there any way to find out the same if source of atomization in spray pyrolysis is air pressure instead of ultrasound.
Atomization by air pressure depending on several parameters especially nebulizer geometry. So I suggest you to get aerosol size information or equation from your nebulizer supplier. Also aerosol size distribution in air pressure atomization is generally wider than ultrasonic system...
Do you have the particle size distribution of the dried InCl3? The droplet distribution can be estimated from the dry particle distribution using the concentration of InCl3 in the original solution.
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