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HPLC-ICP/MS 와 ICP/MS를 이용한 FAPAS 07187 쌀의 총비소, 무기비소, 카드뮴 측정
노현명 ( Hyun Myung Noh ),김지영 ( Ji Young Kim ),김원일 ( Won Il Kim ),( Anitha Kunhikrishnan ),김민지 ( Min Ji Kim12 ),김경진 ( Gyeong Jin Kim ),박기문 ( Ki Moon Park ),류지혁 ( Ji Hyock Yoo ),김두호 ( Doo Ho Kim ),이영자 ( Y 한국환경농학회 2013 한국환경농학회 학술대회집 Vol.2013 No.-
Metal (loid)s such as environmental contaminants affect food safety. Metal (loid)s exist trace extremely in agriculture products. Therefore it is important to analyze accurately about trace these metals. High resolution techniques and quality controls are needed to analyze these materials. In order to achieve quality results, standardized methods and techniques are required. So ISO(International Organization for Standardization) of laboratory proficiency testing is determination of laboratory testing performance by means of inter-laboratory comparison. The values have been derived as a consensus of a number of laboratories using a variety of methods. Proficiency tests were applied to analyze the metal(loid)s [inorganic arsenic (As), total As and cadmium (Cd)] in powdered rice FAPAS 07187 (Food Analysis Performance Assessment Scheme; February-April 2013). The rice powder sample was extracted with 1% HNO3 for inorganic As for microwave-assisted extraction using water at 95℃ for 90 min and their analysis by HPLC/ICPMS. Also, HNO3 for total As and Cd using microwave-assisted extraction using at 200℃ for 50 mins and analysis by ICP/MS. Validation check was performed for accuracy using CRM (NMIJ CRM 7503-a) for inorganic As, and CRM (IRMM-Rice CRM) for total arsenic and cadmium. The result were satisfactory. FAPAS 07187 the z-scores of inorganic As, total As and Cd in powdered rice were-1.8,-0.9 and 0.2(lzl<2, respectively).
단열재가 극저온 용기의 내부지지대 구조설계에 미치는 영향
김두호,지현진,김기열,조성백,Kim, Doo-Ho,Ji, Hyun-Jin,Kim, Ki-Youl,Cho, Sung-Baek 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.3
The cryogenic vessel, storing a liquified solutions as LOX and $LN_2$, consists of a external vessel, internal vessel, thermal insulator and internal support. The internal support should be satisfied with mechanical strength not only to support weight of internal tank but also to maintain uniform space between external and internal tank in spite of external mechanical shock. However, excessive structure design of internal supports is able to increase the amount of heat conduction and the rate of vaporization. The thermal insulator, filled with space between a external and internal vessel, reduces the rate of heat transfer and guarantees the standing time of cryogenic vessel. Especially powder type of insulator has low thermal conductivity and reduce the specification of structure design. In order to evaluate the effect of insulator on structure design, the experiment set-up simulated cryogenic vessel was tested in shock environment according to thermal insulator. As a result, the behavior of internal support under external shock was understood and the design criteria was able to be suggested.
친환경농산물과 GAP농산물 인증제도의 올바른 이해 - 'GAP' 인식부족으로 혼돈 '농법 선택'은 소비자 몫
김두호,Kim, Du-Ho 한국작물보호협회 2009 자연과 농업 Vol.246 No.-
1997년에 '친환경농업육성법'을 제정, 시행하고 2001년부터 친환경 농산물 인증제도를 도입, 운영해 오고 있으나 69%가 저농약농산물로 유기 무농약농산물의 보편화는 이루어 지지 않고 있다. 또 2006년에는 농산물품질관리법에 GAP 제도를 반영시켜 시행, 운영해오고 있으나 인증농산물은 아직 초보단계에 머물고 있는 실정이다.
농작물 재배지 토양 내 비소, 납 및 카드뮴의 농산물로의 전이계수 산출
김지영 ( Ji Young Kim ),이지호 ( Ji Ho Lee ),( Anitha Kunhikrishnan ),강대원 ( Dae Won Kang ),김민지 ( Min Ji Kim ),류지혁 ( Ji Hyock Yoo ),김두호 ( Doo Ho Kim ),이영자 ( Young Ja Lee ),김원일 ( Won Il Kim ) 한국환경농학회 2012 한국환경농학회지 Vol.31 No.4
BACKGROUND: The Transfer Factor (TF) of heavy metals from soil to plant is important, because TF is an indicator of heavy metal in soils and a factor that quantifies bioavailability of heavy metals to agricultural products. This study was conducted to investigate the transfer ability of Arsenic (As), Cadmium (Cd), and Lead (Pb) from soil to agricultural products. METHODS AND RESULTS: We investigated heavy metals (As, Cd and Pb) concentrations in 9 agricultural products (rice, barely, corn, pulse, lettuce, pumpkin, apple, pear, tangerin) and soil. TF of agricultural products was evaluated based on total and HCl-extractable soil concentration of As, Cd, and Pb. Regression analysis was used to predict the relationship of total and HCl-extractable concentration with agricultural product contents of As, Cd, and Pb. The result showed that TF was investigated average 0.006∼0.309 (As), 0.002∼6.185 (Cd), 0.003∼0.602 (Pb). The mean TF value was the highest as rice 0.309 in As, lettuce 6.185, pear 0.717, rice 0.308 in Cd, lettuce 0.602, pumpkin 0.536 in Pb which were dependent on the vegetable species and cereal is showed higher than fruit-vegetables in As. CONCLUSION(S): Soil HCl-extractable concentration of As, Cd, and Pb had the larger effects on thier contents in agricultural products than total soil concentrations. We suggests that TF are served as influential factor on the prediction of uptake. Further study for uptake and accumulation mechanism of toxic metals by agricultural products will be required to assess the human health risk and need TF of more agricultural products.
농작물 재배지 토양 내 비소, 카드뮴 및 납의 농산물로의 생물농축계수 산출
김경진 ( Gyeong Jin Kim ),김지영 ( Ji Young Kim ),김원일 ( Won Il Kim ),노현명 ( Hyun Myung Noh ),김민지 ( Min Ji Kim ),김두호 ( Doo Ho Kim ) 한국환경농학회 2013 한국환경농학회 학술대회집 Vol.2013 No.-
The transfer of heavy metals from soil to plants under conditions of soil pollution is a process of significant importance, because it is considered as the main pathway of human exposure to heavy metal through foodchain. BioConcentration Factor (BCF) is an indicator of heavy metal mobility in soils and a factor that quantifies bioavailability of heavy metals to agricultural products. BCF is defined as ratio of heavy metal concentration in vegetable (dry weight) to that in soil (dry weight). This study was carried out to measure the transfer ability of Arsenic (As), Cadmium (Cd), and Lead(Pb) from soil to agricultural products. We investigated heavy metals (As, Cd and Pb) concentrations in 8 agricultural products (sesame leaf, spinach, chinese cabbage, lettuce, chinese chive, ginseng, deodeok, balloonflower) as well as in cultivated soils. BCF for heavy metals from soil to vegetables for three elements including As, Cd, and Pb was calculated based on total soil concentration. The result showed that BCF values was calculated average 0.006∼0.026 (As), 0.015∼1.395 (Cd), 0.015∼0.076 (Pb). The mean BCF value was the highest as ginseng 0.026 in As, balloonflower 1.395 in Cd, chinese chive 0.076 in Pb. It were dependent on the vegetable type and species. Root vegetables are showed higher than leafy vegetables in As and Cd. We found that BCF are useful in predicting the uptake of heavy metals. Further study of uptake and accumulation mechanism of toxic metals by agricultural products will be required to assess the human health risk associated with soil contamination.