The purpose of this study was to obtain the best anthocyanin pigment extract powder from 3 types of drying process, vacuum drying, spray drying, and freeze-drying. The duration and temperature for each type of drying process are 15 h with temperature of 40 oC, 2 h with temperature of 120 oC (inlet) and 60 oC (outlet), 24 h with temperature of -50 oC respectively. This research used the Randomized Block Design method consisting of three treatments with four replications. If there is a significant difference between treatments, the test is continued with the Duncan test. Three drying methods, namely: Treatment A = Vacuum Drying, Treatment B = Spray Drying, Treatment C = Freeze-drying. The Freeze-drying method produces the best characteristics with total anthocyanin 121.63 mg/100 g (DB), color intensity L* (brightness) 64.20, a* (redness) 65.60, b* (yellowness) 18, 52, water content 5.00%, hygroscopicity 12.87%, solubility 97.21%, dissolution time 151 seconds, pH level 2.93, yield 28.69%, and PSA 0.95 µm. Based on the experiment’s result, freeze-drying method was the most suitable parameter for physiochemistry characteristic. It has the highest amount of anthocyanin, the highest antioxidant activity, and the smallest amount of PSA (Particle Size Analyzer).
R. Rukmana, Ubi jalar, budidaya dan pascapanen, Kanisius, Yogyakarta, 2009.
I.W. Jedeng., Pengaruh jenis dan dosis pupuk organik terhadap pertumbuhan dan hasil ubi jalar (Ipomoea batatas (L.) Lamb.) var. lokal ungu, Postgraduate’s Thesis, Universitas Udayana, Denpasar, 2011.
J. H. Martin, W. H. Leonard, Principles of field crop production, The Mac Millan Company, London: National Open University of Nigeria, 1967, 1044.
D. Juanda, B. Cahyono, Ubi jalar, budidaya dan analisis usaha tani, Kanisius, Yogyakarta, 2000.
Y. Gonnissen, J. P. Remon, C. Vervaet, Effect of maltodextrin and superdisintegrant in directly compressible powder mixtures prepared via co-spray drying, Eur. J. Pharm. Biopharm, 68(2008), 277–282.
J. B. Tama, K. Sri, F. M. Arie, Studi pembuatan bubuk pewarna alami dari daun suji (Pleomele Angustifolia Ne Br), kajian konsentrasi maltodekstrin dan MgCO3, J. Industria, 3(2014), 17-24.
S. P. Wulandari, Kajian Karakteristik Bubuk Pigmen Antosianin dari Ubi Jalar Ungu Kultivar Ayamurasaki dengan Metode Pengeringan Hampa Udara dan Pengeringan Semprot, Undergraduate thesis, Padjadjaran University, Sumedang, 2011.
F. G. Winarno, S. Fardiaz., Pengantar teknologi pangan, PT Gramedia, Jakarta, 1980.
B. C. Wang, R. He, Z. Min Li, The stability and antioxidant activity of anthocyanins from blueberry, J. Food Technol. Biotechnol., 48(2010), 42-49.
H. Hariadi, Comparison of phytochemical characteristics pigmen extract (Anthocyanin) sweet purple potatoes powder (Ipomoea batatas L) and clitoria flower (Clitoria ternatea) as natural dye powder, J. Pharmacog. Phytochem., 7(2018), 3420-3429.
B. Nurhadi, R. Andoyo, M. Mahani, R. Indiarto, Pendekatan konsep suhu transisi gelas dalam mengeringkan madu menggunakan teknologi pengeringan vakum sederhana. laporan akhir hibah kompetitif penelitian strategis nasional, Ministry of National Education, Jakarta, 2010.
J. P. Clark, Understanding drying, 2007 (2014 August 18), Available from: http//www.ift.org.
K. A. Buckle, R.K. Edward, G.H. Fleet, M. Wooton, Ilmu pangan, Translators: Adi Purnomo and Hartono, Penerbit Universitas Indonesia, Jakarta, 1987.
Badan Standardisasi Nasional, SNI susu bubuk (01-2970-2006), Badan Standar Nasional, Jakarta, 2006.
F. D. Vargaz, O. P. López, Natural colorants for food and nutraceutical uses, CRC Press, Washington D. C, 2003.
P. Markakis, Anthocyanin as food colors. Academic Press, New York, 1982.
GEA Niro Research Laboratory, Analytical method, 2005 [cited 2014 March 20], Available from http:// www.niro.dk.
Hariadi, H., Sunyoto, M., Nurhadi, B., & Karuniawan, A. (2020). Study of Drying Method Types on the Physicochemical Characteristics of Purple-Fleshed Sweet Potato Extract Powder. Progress in Color, Colorants and Coatings, 13(1), 41-51. doi: 10.30509/pccc.2020.81600
MLA
H. Hariadi; M. Sunyoto; B. Nurhadi; A. Karuniawan. "Study of Drying Method Types on the Physicochemical Characteristics of Purple-Fleshed Sweet Potato Extract Powder", Progress in Color, Colorants and Coatings, 13, 1, 2020, 41-51. doi: 10.30509/pccc.2020.81600
HARVARD
Hariadi, H., Sunyoto, M., Nurhadi, B., Karuniawan, A. (2020). 'Study of Drying Method Types on the Physicochemical Characteristics of Purple-Fleshed Sweet Potato Extract Powder', Progress in Color, Colorants and Coatings, 13(1), pp. 41-51. doi: 10.30509/pccc.2020.81600
VANCOUVER
Hariadi, H., Sunyoto, M., Nurhadi, B., Karuniawan, A. Study of Drying Method Types on the Physicochemical Characteristics of Purple-Fleshed Sweet Potato Extract Powder. Progress in Color, Colorants and Coatings, 2020; 13(1): 41-51. doi: 10.30509/pccc.2020.81600
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