Analisis Radioaktivitas pada Komoditas Ekspor

Abstract

Tetah dilakukan analisis radiaoaktivitas alam pada komoditas ekspor, cuplikan yang dianalisis terdiri dari jahe gajah (Zingiber officinate) segar, ikan tuna (Katsuwonus pelamis) kaleng, susu segar sapi dan daun tembakau (Nicotiana tabacum) kering Pengukuran radioaktivitas dilakukan dengan menggunakan metode gross a dan gross 13 serta spektrometri y. Pengukuran gross (tidak dibedakan energi maupun mode pelunthannya) a menggunakan aiat cacah a dan pengukuran gross f3 dengan alai cacah 13 jenis Geiger-Mulder. Di dalam analisis y, paparan radiasi diukur menggunakan spektrorneter y dan diidentifikasi radionuklida yang ada (dari energi karakteristiknya) dan masing-tnasing dihitung besar aktivitasnya. Ilasil pengukuran menunjukkan gross a untuk jahe gajah segar (2,446.10"3 ± 8,304.10"$) Bqfgr, ikan tuna kaleng (2,084.10"3 ± 1,323.104) Bq/gi (produksi April 2000) dan (2,269.10"3 ± 18,317.10) Bq/gr (produksi Juni 2000), susu segar sapi (1,901.10"3 ± 8,301.10) Bgfl dan daun tembakau kering (1,272.10 ± 8,329.104) &Or. Aktivitas gross #3 untuk pada jahe gajah segar (6,409 ± 0,314) Bq/gr, ikan tuna kaleng (2,971 ± 0,169) Bq/gr (produksi April 2000) dan (3,826 ± 0,122) Bq/gr (produksi Juni 2000), susu segar sapi (0,278 ± 0,054) Bq/1 dan daun tembakau kering (4,351 ± 0,246) Bq/gr. Dengan spektroskopi y dapat diidentifikasi adanya 5 radioisotop alam berdasarkan puncak tenaga; 40K (1461,3 keV), 208T1 (510,5 keV dan 583,3 keV), 2I2Pb (238,8 keV), 214r" yo (352,8 keV) dan 137Cs (661,2 keV). An analysis has been carried out on the natural radioactivity of export commodity, a sample that analyzed are fresh ginger (Zingiber officinale), tuna skipjack (Katsuwonus pelamis) in oil, cow's fresh milk and dry tobacco (Nicotiana tabacum) leaf. Measurement of radioactivity by applying two methods the gross a and 0 activity analysis and the y spectrometry analysis. In the gross a and 0 activity analysis, the (natural) radiation exposure measured by a counter and GM (p) counter and analyzed by gross methods (no different in energy radiation and decaying modes). In the y spectrometry analysis, the (natural) radiation exposure by y spectrometry and analyzed by spectrometry methods to identify the existing radionuclides (from y energy characteristic) and to calculate the activity of each radionuclide. The result showed that the gross a for fresh ginger (2,446.10-3 ± 8,304.10-5) Bq/gr, tuna skipjack in oil (2,084.10-3 ± 1,323.10-4) Bq/gr (prochiced April 2000) and (2,269.10-3 ± 18,317.104) Bq/gr (produced June 2000), cow's fresh milk (1,901.10-3 ± 8,301.10-5) Bq/1 and dry tobacco leaf (1,272.10-3 ± 8,329.10-5) Bq/gr. The gross j3 activity for fresh ginger (6,409 ± 0,314) Bq/gr, from tuna skipjack in oil (2,971 ± 0,169) Bq/gr (produced April 2000) and (3,826 ± 0,122) Bq/gr (produced June 2000), cow's fresh milk (0,278 ± 0,054) Bq/l and dry tobacco leaf (4,351 ± 0,246) Bq/gr. By using the y spectrometry technique to analyze the (natural) radiation exposure one can identify five natural radioisotopes; 40K (1461,3 keV), 2°8T1 (510,5 keV and 583,3 keV), '12Pb (238,8 keV), 214Pb (352,8 keV) and 137Cs (661,2 keV).