Extraction of anthocyanin pigment from hibiscus sabdariffa l. by ultrasonic-assisted extraction

Abstract

Roselle flower contains various active compounds including organic acid, hydroxycitric acid, hibiscus acid, anthocyanin, flavonoids and polysaccharides The anthocyanin compounds in rosella flowers are the most important pigment of vascular plants, harmless and that make it interesting is a soluble pigment in water media Anthocyanin extract is one of the most successful natural sensitizers for solar cells, because this organic dye produces a high yield of photons to current conversion and is easy to obtain and cheap. Anthocyanins can be potential as sensitizers, because they range in the light spectrum from red to blue. The purpose of this study was to obtain anthocyanin pigments at the optimum extraction conditions from roselle flowers. The optimization of the method was carried out by analyzing the effect of ultrasonic wave frequency, process temperature, extraction time, and mass ratio of roselle flowers to the volume of distilled water on the anthocyanin concentration. The qualitative and quantitative compositions of the anthocyanin extract of rosella flowers were analyzed by UV-Vis spectrophotometer. The results showed that the optimal operating conditions for the extraction process were known at a temperature of 40 °C, a frequency of 24 kHz, a time of 5 minutes, and a ratio of 1: 25.

Preservation of color and nutrients in anthocyanin‐rich edible flowers: Progress of new extraction and processing techniques

“…Pinela et al (2017) also demonstrated that ultrasound‐assisted extraction has the advantage of recovering anthocyanins from Hibiscus sabdariffa calyces. Yuniati et al (2021) found that ultrasound at a frequency of 24 kHz lasting 5 min showed a rich source of anthocyanins, however, the use of high temperatures and longer extractions could damage the pigments in cells. Similar studies also observed that ultrasonic‐assisted extraction was more effective for extraction of anthocyanins from butterfly pea than conventional extraction (Syafaa' tullah et al, 2020).…”

Ekstraksi Zat Warna Antosianin Dari Bunga Telang (Clitoria ternatea L.) Dengan Metode Ekstraksi Berbantuan Ultrasonik dan Aplikasinya Untuk Minuman

“…Antosianin tersusun atas sebuah aglikon (antosianidin) yang teresterifikasi terhadap gugus glikon gula. Senyawa ini memiliki beberapa bentuk antosianidin yang berbeda, mulai dari sianidin, pelargonidin, malvidin, petunidin, peonidin, dan delfinidin [6]. Dengan bentuk yang berbeda ini, senyawa antosianin dapat diwujudkan dalam rentang variasi kenampakan warna biru, merah, hingga ungu, yang mana hal ini menjadi kekhasan tersendiri dari senyawa antosianin [7].…”

“…attempted to study the extraction process of telang flower petals to obtain anthocyanin extract and determine the factors that influence the extraction process using the Ultrasound Assisted Extraction method, so that it can finally be used as a beverage product. From this research, the optimum achievement for dye extraction from butterfly pea petals was at conditions of F/S 0.02 g/ml, extraction temperature of 60°C, and extraction time of 90 minutes, with anthocyanin concentration in the drink obtained at 19.57 mg/L.…”

Ekstraksi Minyak Atsiri dari Bunga Mawar (Rosa hybrda L.) dengan Metode Solvent Free Microwave Extraction

“…Penelitian awal terkait metode ekstraksi SFME pada bunga mawar sangat diperlukan untuk mengetahui kondisi optimum ekstraksi untuk mendapatkan zat ekstrak dengan persentase yield setinggi-tingginya [11,12]. Selain itu, penelitian ini juga diperlukan untuk mengetahui kandungan senyawa yang ada pada minyak atsiri yang berhasil diekstrak dengan metode green chemistry.…”