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미강유 중의 미량금속의 방사화분석
Neutron Activation Analysis of Trace Metals in Rice Bran Oil - Determination of Manganese and Copper -
HWAHAK KONGHAK, December 1971, 9(4), 191-196(6), NONE
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Abstract
미강유의 안정성에 영향을 미칠 미량원소들 중에서 망간 및 구리를 방사화분석하였다. 망간은 TRIGA MARK Il 원자로의 pneumatic tube（neutron flux=3.4×1012 n ㎝-2 sec-1）에서 10분간 조사한 후 비파괴분석법으로, 구리는 60분간 조사한 후 음이온교환수지를 사용하는 분리법에 따라 분리하여 정량하였다.
공정별로 채취한 탈랍원유, 탄산유, 탈색유 및 탈취유를 시료로하여 분석한 결과 망간함량은 각각 13.4, 2.6, 0.24 및 0.33 ppm이었고, 구리함량은 0.24, 0.21, 0.056 및 0.040 ppm이었다. 정제유（탈색유 및 탈취유）의 망간함량은 대단히 많아, Privett가 지적한, 촉매로서 한계량인 0.025 ppm에 4∼13배에 달했고, 구리는 대체로 외국의 수준이었다.
공정별로 채취한 탈랍원유, 탄산유, 탈색유 및 탈취유를 시료로하여 분석한 결과 망간함량은 각각 13.4, 2.6, 0.24 및 0.33 ppm이었고, 구리함량은 0.24, 0.21, 0.056 및 0.040 ppm이었다. 정제유（탈색유 및 탈취유）의 망간함량은 대단히 많아, Privett가 지적한, 촉매로서 한계량인 0.025 ppm에 4∼13배에 달했고, 구리는 대체로 외국의 수준이었다.
With the object of checking the stability of domestic rice bran oil, manganese and copper in trace amounts were analysed by neutron activation analysis. Manganese was determined by the nondestructive method after it was irradiated at the pneumatic tube （neutron flux=3.4×1012 n ㎝-2 sec-1） of the TRIGA MARK II reactor for 10 min. and copper by the destructive method which uses an anion exchange resin to concentrate copper after irradiation for 1 hr.
The manganese and copper contents （along with the respective experimental standard deviations） of dewaxed crude oil, deacidified oil, bleached oil and deodorized oil, sampled from each process of one batch processing, were 13.4±0.4, 2.6±0.2, 0.24±0.01 and 0.33±0.03 and 0.24±0.03, 0.21±0.03, 0.056±0.007 and 0.040±0.002, respectively.
The contents of manganese in domestic rice bran oil compared with that of a foreign product are extraordinarily high, while the copper contents seem to be in the similar level as the contents of foreign products.
The manganese and copper contents （along with the respective experimental standard deviations） of dewaxed crude oil, deacidified oil, bleached oil and deodorized oil, sampled from each process of one batch processing, were 13.4±0.4, 2.6±0.2, 0.24±0.01 and 0.33±0.03 and 0.24±0.03, 0.21±0.03, 0.056±0.007 and 0.040±0.002, respectively.
The contents of manganese in domestic rice bran oil compared with that of a foreign product are extraordinarily high, while the copper contents seem to be in the similar level as the contents of foreign products.
