Assessment Of Biosolar Quality By Measuring Its Carbon-14 Activity Through Liquid Scintillation Technique

摘要

Assessment of biosolar quality by measuring its carbon-14 activity through liquid scintillation technique has been investegated. The purpose of this study was to determine the concentration of the component in biodiesel samples by measuring Carbon-14 of specific activity using Liquid Scintillation Counting (LSC). Sample counting was carried out in two steps. The first step is to determine optimum counting time have to obtain best value of disintegration per minute (DPM) and efficiency (Triple to Double Counting Ratio, TDCR) respectively and secondly is to determine the average value of counting results of the samples at the optimum time. ~(14)C activity measurements were performed by mixing 8 ml of the sample and standard solutions of biosolar and 12 mL scintillator solution into a 20 mL plastic vial with counting span of 5-240 minutes. The results showed that specific activity (As) found for each standard solution (in dpm/gC), namely biosolar Sl 5% 2.1184; S2 10% 5.1981; S3 15% 10.6071; S4 20% 13.0885, and S5 25% 14.5958. while for biosolar sample, Xl was 1.9218 for concentration, C = 4.04%, X2 2.6502 for C 5.14%, and X3 2.0744 for C 4.27%. It can be concluded that a strong tool to verify the quality of biosolar produced by a seller.