Comparison of 2 MeV and 10 MeV electron beam machine (EBM) in degrading antinutritional phytic acid compound in Indonesian variety mitani soybean flour
Rindy Panca Tanhindarto1, Suwimol Jetawattana3, Deudeu Lasmawati1, Indra Mustika Pratama1, Henni Widyastuti1, Rafi Eko Hindarto2, Ashri Mukti Benita1, Zubaidah Irawati1.
1Research Center for Radiation Process Technology (PRTPR), BATAN, National Research and Innovation Agency (BRIN), South Jakarta, Indonesia; 2Department of Agriculture, Faculty of Animal and Agriculture Sciences, Diponegoro University, Semarang, Indonesia; 3Thailand Institute of Nuclear Technology (TINT), Bangkok, Thailand
Irradiation technology using Co-60 and machine sources (electron beams and x-rays have been widely used in the food sector for sanitary and phytosanitary. In recent years, many studies have been carried out on irradiation technology for food modification, one of which is to degrade antinutrient compounds phytic acid. This study aims to compare the effectiveness of two electron beam machines with 2 MeV and 10 MeV energies in degrading phytic acid compounds found in Indonesian soybean varieties Mitani (Yellow Soybean). Soy powder samples weighing 72 grams were packaged in polyethylene plastic and irradiated at 2 electron beam facilities, 2 MeV GJ 2 in BATAN, Indonesia, and 10 MeV GEMS in TINT, Thailand. Irradiation was carried out using two techniques, single-sided with dose variations of 0, 10, 20, 30, 40, 50 kGy and double-sided (dose fractionation) with a total dose of 0, 10, 20, 30, 40, 50 kGy. The results showed that both facilities with an energy of 2 MeV and n 10 MeV could degrade phytic acid compounds in soybeans. For doses < 30 kGy, the one-sided irradiation technique with 2 MeV and 10 MeV EBM was effective in degrading phytic acid up to 40-50% compared to the two-sided irradiation technique. For energy > 30 kGy, irradiation with the energy of 10 MeV one-sided technique can degrade phytic acid compounds up to 81.15%. 
