Formulation and characterization of herbal tea from hibiscus (hibiscus sabdariffa L.) and lemon verbena (aloysia citrodora)

ABSTRACT

This study aimed to produce herbal tea using an infusion of Hibiscus with Lemon verbena. Dried Hibiscus calyces and lemon verbena leaves were combined in a percentage of: 90:5 (HL1), 90:10 (HL2), 85:15 (HL3), 80:20 (HL4), 75:25 (HL5), 70:30 (HL6), 65:35 (HL7), 60:40 (HL8), 55:45 (HL9), 50:50 (HL10), respectively, and commercial tea and 100% Hibiscus were used for comparison. The formulated tea was evaluated for pH, total soluble solids (TSS), color density, hue tint, total phenolics, total flavonoids, DPPH radical scavenging capacity and ferric reducing antioxidant power (FRAP), sensory acceptance (7-hedonic scale) and their correlation were determined. No significant differences (p > .05) were found for total soluble solids (TSS). The pH, total flavonoids, total phenolics and antioxidant capacities of blended tea were significantly decreased with the concentrations of calyces. The blended tea had sensory acceptance with incorporation of 10–45% dried lemon verbena leaves, and potential phytochemical and antioxidant capacities.

KEYWORDS:

• Antioxidants
• herbal tea
• hibiscus
• phytochemicals
• sensory evaluation

Acknowledgment

The authors are thankful to Ethiopia Institute of Agricultural Research, Ethiopia for providing literature collection facilities, which helped in the study

Disclosure statement

No potential conflict of interest was reported by the author(s).

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Consent to participate

Corresponding and all the co-authors are willing to participate in this manuscript.

Consent for publication

All authors are willing for publication of this manuscript

Data availability

Even though adequate data has been given in the form of tables and figures, however, all authors declare that if more data is required then the data will be provided on a request basis.

Additional information

Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript