Abstract
Manual headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography-mass spectrophotometry (GC-MS) was used for the qualitative analysis of the aromas of several tropical fruits from Indonesia i.e. two different cultivars of roselle pomace (Hibiscus sabdariffa purple and red cultivar. Pomace was used as samples as a part of valorization application of agroindustry by-product. The analytes identified included aroma compounds that can be derived from several aroma precursors. A total of 16 major volatile compounds were identified from purple roselle pomace, whereas 11 major volatile compounds were identified from red roselle pomace using HS-SPME. The major free volatile compounds were dominantly derived from fatty acid compounds. PCA analysis showed the difference in the aroma profile of two different cultivars of pomace based on the cultivar. PC1 can differentiate 86.4% between two roselle pomace cultivar whereas PC2 can differentiate 9.4% between two roselle pomace cultivar. This study also provides the map for free volatile compounds of pomace in two different roselle cultivars.
Highlights
Hibiscus sabdariffa or called roselle is a tropical wild plant belonging into Malvaceae family
This research is aimed on focusing on the use of pomace from red and purple roselle from Indonesia, especially to screen the aromatic compounds in the pomace which can be used as valuable flavor compounds using HS SPME coupled to GC MS
The aim of this research was to investigate the diversity of volatile profiles within two different roselle pomace, e.g. red and purple roselle using GC-MS and PCA as one of chemometrics assessment
Summary
Hibiscus sabdariffa or called roselle is a tropical wild plant belonging into Malvaceae family. It is an annual or perennial plant. It has a long history of edible and medicinal uses spanning from Egypt, Sudan, Trinidad and Tobago, Mexico, China, Thailand, Malaysia, Indonesia, and India to South America (Patel, 2014). The beverages from roselle are consumed in traditional like in Africa continent a non-alcoholic beverage soborodo is prepared from the water extract of dried calyces. It is used as a folk medicine for constipation, heart ailment, high blood pressure, urinary tract infections, cancer, diabetes, and nerve disorders. Antioxidant, hypocholesterol effect, anti-obesity, hypotensive, antidiabetic, immunomodulatory, anticancer, hepatoprotective, antimicrobial, renoprotective, have got several adequate experimental evidence (Patel, 2014)
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