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안재민 ( Jae-min An ),홍경숙 ( Kyong-suk Hong ),윤혜정 ( Hye-jeong Yun ),김성연 ( Sung-youn Kim ),유경은 ( Kyung-eun Yu ),신희창 ( Hee-chang Shin ),윤재돈 ( Jae-don Yun ),이재훤 ( Jae-hwon Lee ),김동호 ( Dong-ho Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
The present study was carried out to reduction of lead(Pb), cadmium(Cd), mercury(Hg), arsenic(As), chromium(Cr) and nickel(Ni) concentrations by 5 milling degrees(0.0%, 2.4%, 4.8%, 7.2% and 9.6%, from husked rice to polished rice) in rice. Recently, various rice by milling degree is sold for health and taste. To provide safe food to consumers, it is need to know the change of their concentrations according to milling degree of rice. Pb, Cd, As, Cr and Ni analysis in milled rice 255 samples were performed using microwave device and Inductively Coupled Plasma Mass Spectrometry(ICP/MS), whereas mercury was determined by automatic mercury analyzer(DMA-80). The contents of lead, cadmium, mercury, arsenic, chromium and nickel in samples were determined. The contents of lead was 0.0010-0.0572 mg/kg, cadmium was 0.0031-0.1009 mg/kg, mercury was 0.0001-0.0421 mg/kg, arsenic was 0.028-0.244 mg/kg, chromium was 0.016-0.495 mg/kg and nickel was 0.027-0.608 mg/kg, respectively. The Limit of detection(LOD), Limit of quantification(LOQ) and correlation coefficient(R2) for heavy metals(Pb, Cd, Hg, As, Cr and Ni) were 0.38-0.66 μg/kg, 1.21-2.09 μg/kg and 0.9999-1.0000, respectively. The recovery results and coefficient of variations were in the range 91.3-103.5% and 2.82-4.50%, by tested certified reference materials(CRM) and spiked standard solutions. For risk assessment, daily intakes of heavy metals were calculated and compared with provisional tolerable weekly intake(PTWI) or provisional tolerable monthly intake(PTMI) established by the Joint FAO/WHO Expert Committee on Food Additives(JECFA). Therefore, the level of overall dietary exposure to heavy metals for Korean through from these results, conforming with increase of milling degree of rice, heavy metal concentration tended to decrease. The contents of heavy metal were decreased 57.7% in lead, 13.0% in cadmium, 50.3% in mercury, 38.2% in arsenic, 59.1% in chromium and 48.5% in nickel in according to the highest milling degree of 9.6%(polished rice). The reduction rate of heavy metals were as Cr>Pb>Hg>Ni>As>Cd.
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국내 다소비 농산물의 알루미늄 농도 모니터링 및 농산물 섭취로 인한 위해도 평가
안재민 ( Jae Min An ),홍경숙 ( Kyong Suk Hong ),김성연 ( Sung Youn Kim ),김지혜 ( Ji Hye Kim ),유경은 ( Kyong Eun Yu ),김효영 ( Hyo Young Kim ),박형달 ( Hyoung Dal Park ),이재훤 ( Jae Hwon Lee ),김동호 ( Dong Ho Kim ) 한국환경농학회 2015 한국환경농학회지 Vol.34 No.4
BACKGROUND: This study was carried out to collect occurrence data on aluminum in 12 type agricultural products and assess dietary exposure risk to the Korean population health for aluminum concentration in agricultural products.METHODS AND RESULTS: Aluminum analysis samples were performed using microwave device and Inductively Coupled Plasma Optical Emission Spectrometer. The LOD(Limit of Detection) for aluminum was 0.851 ug/kg,while the LOQ(Limit of Quantitation) was 2.838 ug/kg and recovery was 97.6% for aluminum. The average levels of aluminum in mg/kg were 0.526 for rice, 0.546 for Korean cabbage, 1.316 for corn, 6.207 for soybean, 0.549 for sweet potato, 0.257 for potato, 6.963 for spinach, 1.213 for carrot,0.524 for garlic, 0.950 for radish, 1.015 for leek, and 3.511 for Welsh onion. The dietary exposures of aluminum through usual intake were polished rice 89.31 ug/day,Korean cabbage 33.14 ug/day, corn 0.66 ug/day, soybean 3.72 ug/day, sweet potato 6.86 ug/day, potato 4.96 ug/day,spinach 45.96 ug/day, carrot 6.79 ug/day, garlic 2.36 ug/day, radish 7.32 ug/day, leek 2.23 ug/day and Welsh onion 43.89 ug/day, taking 0.57%, 0.21%, 0.00%, 0.02%,0.04%, 0.03%, 0.04%, 0.04%, 0.02%, 0.05%, 0.01% and 0.28% of PTWI(2 mg/kg b.w./week), respectively.CONCLUSION: The levels of overall dietary exposure to aluminum for Korean population through intake of agricultural product was far below the recommended JECFA level, indicating of least possibility of risk.
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전자눈을 이용한 햅쌀, 묵은쌀 및 이의 혼합쌀 판별 분석
홍지화(Jee-Hwa Hong),이재훤(Jae-Hwon Lee),조영호(Young-Ho Cho),최경후(Kyung-Hu Choi),이민휘(Min-Hui Lee),박영준(Young-Jun Park, and),김현태(Hyun-Tae Kim) 한국식품과학회 2017 한국식품과학회지 Vol.49 No.5
본 연구는 햅쌀과 묵은쌀 및 이의 혼합곡 판별을 위하여 전자눈 분석을 이용한 쌀 신곡과 구곡 판별법 개발 연구를 수행하였다. 국내에서 수집된 신구곡을 대상으로 GOP 시약처리를 통해 효소 활성에 따른 정색 반응을 확인한 후 전자눈 장비를 이용하여 신곡과 구곡의 판별에 적합한 색깔 코드의 선별과 이를 이용한 쌀 신곡과 구곡의 판별법을 개발하였다. 미지시료를 이용하여 판별 정확도를 분석한 결과 신곡과 구곡인 단일곡은 100%의 정확도로 판별이 되었으나 혼합곡의 경우 혼합된 비율에 따라 판별 정확도가 달라졌다. 혼합곡은 신곡과 구곡의 혼합 비율에서 구곡이 비율이 높아질수록 판별 정확도가 높아지는 것으로 나타났다. 이러한 결과를 통해 전자눈 분석을 통하여 햅쌀과 묵은쌀을 판별할 수 있는 실용적인 판별 체계를 구축하였으므로 본 연구를 통해 개발된 판별식은 쌀 신구곡 판별을 위한 과학적인 근거자료로서 활용이 가능할 것으로 판단된다. The objective of this study was to develop methods for the discrimination of new and stale rice by using an electronic eye. To develop the discriminant, 107 rice samples produced in the years 2015 and 2016 were investigated. After the rice was treated with guaiacol, oxydol, and p-phenylenediamine reagents, an electronic eye was applied to discriminate between newly harvested rice and rice stored for 1 year. Out of the 4,096 color codes of the electronic eye, 31 color codes were identified for the discrimination of newly harvested rice and rice stored for 1 year. The classification ratio of newly harvested rice and rice stored for 1 year was 100% and the discrimination accuracy for unknown samples was 100%. In a total of 150 mixtures of new rice and stale rice, the discrimination accuracy was between 16.7 and 95.6%, depending on the mixing ratio. This capability of the electronic eye will be useful as a tool for discriminating the production year of rice.
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소각로 인근에서 재배되는 농산물의 다이옥신류 모니터링 및 위해도 평가에 관한 연구
신희창 ( Hee-chang Shin ),홍경숙 ( Kyong-suk Hong ),안재민 ( Jae-min An ),윤혜정 ( Hye-jeong Yun ),김성연 ( Sung-youn Kim ),유경은 ( Kyung-eun Yu ),윤재돈 ( Jae-don Yun ),이재훤 ( Jae-hwon Lee ),김동호 ( Dong-ho Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
Dioxins(PCDDs; Polychlorinated dibenzo-p-dioxins, PCDFs; Polychlorinated dibenzofurans) are accumulated in the body through the food as a representative environmental pollutants. Dioxins are flowed into the environment through the incineration of chemical products and electrical products containing PCBs. Dioxins generated from incinerators can pollute the atmosphere and soil, and it were accumulated in the body through food. Therefore, the dioxins monitoring of agricultural products produced near incinerators are required to ensure the safety of agricultural products. In this study, the analysis of dioxins was carried out on the basis of the law of the U.S Environment Protection Agency (EPA) Method 1613 and Korean Food Standards Codex Method SOP. The fifty agricultural products were collected in the field around the incinerators. As a result, the concentration range of detected dioxins was (0.0507~0.5824) pg/g. In the range of concentrations that reflect the toxic equivalent factor is (0.00002~0.01631) TEQ pg/g. The contribution of agricultural products to the dioxins intake is not equally distributed: tomato (74%), Corn (15%), Cabbage (9%), Green pepper (2%), red pepper (0.04%), Blueberries (0.0006%). The estimated daily intake of Korean Population through agricultural products was 0.00430 pg TEQ/kg body weight/day, and it was estimated at about 0.11% of tolerable daily intake(TDI) of Korea. Consequently, Dioxins exposure levels of agricultural products produced near incinerators has been found to be very safe.
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