Assessment of Antioxidant Activity of Spray Dried Extracts of Psidium guajava Leaves by DPPH and Chemiluminescence Inhibition in Human Neutrophils

Table 2

Equations used to determine the spray dryer performance.

Parameter	Equation	Unit	Equation
Product recovery (𝑅)	𝑅=Mc⋅(1−𝑋𝑝)𝑊𝑠⋅𝐶𝑠⋅𝜃×100	(%) g/g	(1)
Thermal efficiency (𝜂)	𝜂=(𝑇gi−𝑇go)(𝑇gi−𝑇amb)×100	(—)	(2)

Mc: mass collected (g); 𝑋_𝑝: product moisture content (g/g); 𝑊_𝑠: flow rate of feed composition (g/min); 𝐶_𝑠: concentration of total solids (g/g), 𝜃: processing time (min); 𝑇_gi: inlet gas temperature (°C); 𝑇_go: outlet gas temperature (°C); 𝑇_amb: environment temperature (°C).