Abstract
Abstract
 In the processing, the red ginger powder was dried at 50°C. Red ginger powder is hygroscopic, so it is easy to absorb moisture. This research aims to determine (i) the isothermic absorption curve model in red ginger powder with different fineness modulus and (ii) the expiration date using the critical moisture content method in various types of packaging materials. Moisture sorption isotherm of red ginger powder was determined by the static gravimetric method at 300C. The relationship equilibrium moisture content between relative humidity (RH) is described by the Hasley, Chen-Clayton, Henderson, Caurie, and Oswin Models. The Estimated shelf life is determined using the ASLT (accelerated shelf-life testing) method and calculated using the Labuza model with a critical water content approach. The results obtained that moisture sorption isotherm red ginger powder has sigmoid shape a type II. Henderson is the model that illustrates the accuracy of the ISA curve of red ginger powder of 60 mesh particle size while the Chen-Clayton Model illustrates the accuracy of the ISA curve of red ginger powder of particle size of 80 mesh. The shelf life of red ginger powder is 60 mesh particle size and using HDPE, PP, and aluminum foil packaging which is stored at 75% RH and 300C temperature is 118.85 days, 467.63, and 609.26 days, respectively. The shelf life of red ginger powder 80 particle size is 148.17 days, 582.98 days and 759.54 days.
Highlights
Proses pengolahan bubuk jahe merah dikeringkan pada suhu 55°C
the red ginger powder is dried at 55°C
Moisture sorption isotherm of red ginger powder was determined by the static gravimetric method at 30°C
Summary
Bahan dan Alat Bahan utama yang digunakan adalah bubuk jahe merah yang diproduksi oleh Usaha Kecil Menengah (UKM) Hersin Bogor Binaan IncuBie LPPM IPB. Jenis kemasan yang digunakan pada penelitian ini adalah alumunium foil, plastik HDPE (High Density Polyethylene) dan plastik PP (Polipropilen). Bahan lain yang juga digunakan adalah, garam jenuh, diantaranya MgCl2, Mg(NO3), NaCl, KCl, Na2SO4, dan aquades. Alat-alat yang digunakan dalam penelitian ini DGDODK RYHQ WRSOHV PRGL¿NDVL GHVLNDWRU WLPEDQJDQ analitik, cawan alumunium, inkubator, peralatan gelas, Hygrometer, dan ayakan tyler
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