2015
DOI: 10.1590/1678-457x.6687
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Composition and color stability of anthocyanin-based extract from purple sweet potato

Abstract: Purple sweet potato (PSP) can provide products with attractive color besides nutritious benefits in food processing. So, the compositions and color stability of an aqueous anthocyanin-based PSP extract were investigated in order to promote its wide use in food industry. PSP anthocyanins were extracted with water, and nine individual anthocyanins (48.72 ug mL -1 in total, 24.36 mg/100 g fresh PSP in yield) were found by HPLC analysis. The PSP extract also contained 17.11 mg mL of Mg. Changes in color and stabil… Show more

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Cited by 74 publications
(36 citation statements)
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“…1(b)] shown peak formation at λmax 575 nm (pH 1), 570 nm (pH 4 and 7), 585 (pH 11 and 13). This was similar to the shape of the spectrum of purple sweet potato that has been identified contains anthocyanin pigment and has a peak at λmax 610 nm [20]. Hence, it can be expected that the orange-peel pink-flesh extract contains anthocyanin.…”
Section: Identification Of Dragon Fruit Pigment Compoundssupporting
confidence: 78%
“…1(b)] shown peak formation at λmax 575 nm (pH 1), 570 nm (pH 4 and 7), 585 (pH 11 and 13). This was similar to the shape of the spectrum of purple sweet potato that has been identified contains anthocyanin pigment and has a peak at λmax 610 nm [20]. Hence, it can be expected that the orange-peel pink-flesh extract contains anthocyanin.…”
Section: Identification Of Dragon Fruit Pigment Compoundssupporting
confidence: 78%
“…Analisis menggunakan spektrofotometer uv-vis menunjukkan absorbansi optimum pada panjang gelombang 530 nm (Gambar 1) seperti pada beberapa penelitian sebelumnya (He et al 2015); (Montilla, Hillebrand, dan Winterhalter 2011). Panjang gelombang ini nantinya akan digunakan dalam analisis intensitas warna serbuk antosianin hasil mikroenkapsulasi.…”
Section: Hasil Dan Pembahasan Ekstrak Antosianin Ubi Unguunclassified
“…Hal ini didebabkan karena intensitas cahaya lampu neon dapat memancarkan energi dan sebagian energinya diserap oleh antosianin dan menyebabkan reaksi fotokimia, reaksi ini menyebabkan pembukaan cincin aglikon pada antosianin, yang diawali dengan pembukaan cincin karbon kedua sehingga membentuk senyawa yang tidak berwarna seperti kalkon dan selanjutnya membentuk alfa diketon yang berwarna coklat (Markakis, 1982;Lestario et al, 2014). Hasil penelitian ini sejalan dengan penelitian He et al (2015) yang menemukan bahwa penyinaran lampu neon dapat menyebabkan degradasi warna ekstrak yang terlihat dari penurunan absorbansi ekstrak ubi jalar ungu.…”
Section: Pemindaian Panjang Gelombang Maksimum Antosianin Buah Murbeiunclassified