Optimization of drying parameters in the microencapsulation of volatile oil from Spiranthera odoratissima leaves

Sônia Júlia Oliveira de Souza,Joelma Abadia Marciano de Paula,Suzana Ferreira Alves,Luiz Carlos da Cunha,Tatiana de Sousa Fiuza,Jerônimo Raimundo de Oliveira Neto,Leonardo Luiz Borges,Stone de Sá,José Realino de Paula

doi:10.33448/rsd-v10i4.14322

Abstract

Spiranthera odoratissima A. St.-Hil. (Rutaceae), "manacá", is popularly used for head, muscle aches, rheumatism and, stomach, uterine, renal and liver disorders. The aims of this study were to investigate the physico-chemical and morphological properties of microencapsulated powder of volatile oil from S. odoratissima leaves, optimize the drying process and verify the influence of drying parameters on microencapsulation by spray-drying. The volatile oils from leaves were extracting by hydrodistillation in a Clevenger type apparatus and analyzed by GC/MS. The emulsions were prepared and spray-dried. Box-Behnken experimental model was used for optimize the effects of drying parameters on the encapsulation responses. The β-caryophyllene content in the microcapsules was determined by HPLC. The results suggest that the best operational conditions for the atomization drying of S. odoratissima volatile oil were inlet temperature of 158°C, feed flow of 0.25L/h and drying nozzle diameter of 0.7mm. These results reveal the technological potential of the microcapsules obtained from S. odoratissima volatile oils.

Highlights

The S. odoratissima roots is popularly used in the form of tea for stomach pain, headaches, muscle aches, liver disorders and rheumatism, while the tea from the leaves is used for stomach, uterine, kidney and liver disorders (Silva & Felfili, 2012; Trezenzol, et al, 2006; Verde, et al, 2003)
3.1 Volatiles oils by gas chromatography coupled to mass spectrometry (GC/MS) It was verified in volatile oil (VO) from S. odoratissima leaves: 84.01% of sesquiterpene hydrocarbons, 11.35% of oxygenated sesquiterpenes and 0.13% of monoterpene hydrocarbons
The best operational conditions for the atomization drying of S. odoratissima volatile oil were inlet temperature of 158°C, feed flow of 0.25L/h and drying nozzle diameter of 0.7mm

Summary

Introduction

Its leaves have secretory cavities containing volatile oil (Jarald, et al, 2008; Matos, et al, 2014). Scientific studies verified analgesic and anti-inflammatory activities of ethanol extract (Matos, et al, 2003) and anxiolytic activity of volatile oil (VO) from S. odoratissima leaves in rats (Galdino, et al, 2012, Oliveira, et al, 2020). The antimicrobial activity of leaf volatile oil was observed against Micrococcus roseus 1740 (MIC=0.195mg/ml) and Candida albicans NTC 2010 (MIC=1.562 mg/ml) (Chaibub, et al, 2013). Souza et al, (2020) verified antibacterial activity of the most polar extracts from S. odoratissima leaves against L. monocytogenes (MIC values ranged between 12.5 and 62.5 μg mL)

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