Influence of essential oil: cyclodextrin ratio and stirring rate on physicochemical characteristics of orange essential oil: β-cyclodextrin microparticles

Figures & data

Table 1. Effect of ratio and stirring speed on the total oil, surface oil, entrapment efficiency, and yield.

Treatment	Ratio OEO:βCD	Stirring speed	TO	SO	OR	EE	Y
	(w/w)	(rpm)	(mg/g)	(mg/g)	(%)	(%)	(%)
T1	0.15	300	209.54 ± 2.21^ab	18.19 ± 3.30^ab	66.61 ± 0.12^a	91.31 ± 1.64^ab	40.68 ± 0.45^a
T2	0.84	300	187.55 ± 5.32^a	23.62 ± 3.84ª	20.54 ± 0.05^b	87.43 ± 1.84^a	50.41 ± 0.16^b
T3	0.15	700	206.93 ± 5.85^b	10.02 ± 2.33^b	79.13 ± 0.13^c	95.18 ± 0.98^b	49.69 ± 0.28^b
T4	0.84	700	185.23 ± 3.46^c	35.83 ± 3.14^c	20.56 ± 0.05^b	80.65 ± 1.78^c	51.26 ± 0.07^c

TO: total oil/powder microparticle (mg/g), SO: surface oil/powder microparticle (mg/g), OR: orange oil retention (%), EE: entrapment efficiency (%), Y: yield (%). Values are shown as mean ± standard deviation (S.D). Letters different indicated significative different (p < .05) among treatments.

Table 2. Particle size distribution of particle size at different OEO:β-CD ratios and stirring speeds.

Treatment	Ratio OEO:β-CD	Stirring speed	d10	d32	d43	Span
	(w/w)	(rpm)	(µm)	(µm)	(µm)
T1	0.15	300	9.19 ± 0.05^a	44.46 ± 0.03^a	54.54 ± 0.07^a	0.89 ± 0.00^a
T2	0.84	300	13.34 ± 0.14^b	45.41 ± 0.10^b	54.79 ± 0.01^b	0.89 ± 0.00^a
T3	0.15	700	9.62 ± 0.19^c	41.25 ± 0.07^c	52.62 ± 0.07^c	1.02 ± 0.00^b
T4	0.84	700	7.43 ± 0.06^d	42.54 ± 0.06^d	54.49 ± 0.01^a	0.89 ± 0.00^c

Values are shown as mean ± standard deviation (S.D). Letters different indicated significative differences (p < .05) among treatments.

Figure 1. Value obtained of BRAR and FAR.

Figure 2. Cumulative distribution and D90 percentile of circularity, smoothness, and opacity of the microparticles.

Figure 3. Correlation graphs between shape parameters.

Figure 4. FTIR spectra of pure β-CD, OEO, and of the OEO:β-CD microparticles.