A solution of salt in deionized water (3% w/w) was prepared, completely dissolved and filtered through Whatman Number 2 filter paper (Clifton, NJ, USA) and subsequently was processed by nano-spray drying (Nanospray dryer B-90, BÜCHI Labortechnik AG, Flawil, Switzerland). The sodium chloride solutions were sprayed through the 4 μm nozzle. The air flow (125 l/min), pressure (3.8 kPa), head temperature (95˚C) and spray percentage (90%) were kept constant in all treatments.