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박철우,반경녀,이영남,김정옥,김민석,하영래,Park, Cherl-Woo,Bahn, Kyeong-Nyeo,Lee, Young-Nam,Kim, Jeong-Ok,Kim, Min-Seok,Ha, Yeong-Lae 한국식품영양과학회 2007 한국식품영양과학회지 Vol.36 No.3
The concentrations of conjugated linoleic acid (CLA) in twelve Korean mothers' milk samples collected in October 2006 and four infant formula samples produced by Korean manufacturers were determined. CLA detected from both mothers' milk and infant formula samples was only cis-9, trans-11 CLA isomer. The amount of cis-9, trans-11 CLA in Korean mothers' milk (100 mL) ranged from 4.32 to 10.12 mg ($6.27{\pm}0.28\;mg$). Infant formula (13 g), which is the manufacturers' recommended amount to make up 100 mL with water, contained cis-9, trans-11 CLA isomer in amounts ranging from 1.61 to 2.97 mg ($2.27{\pm}0.31\;mg$). 한국인 모유에는 cis-9, trans-11 CLA 이성체만 동정되었고, 그 함량은 $4.32{\sim}10.12\;mg/100\;mL$(평균 $6.27{\pm}0.28\;mg/100\;mL$)이었고, 지방함량 중에는 $1.35{\sim}3.13\;mg/g$(평균 $1.96{\pm}0.06\;mg/g$)으로 개인에 따라 큰 차이가 있었다. 한국인 모유에 함유된 CLA의 함량은 외국의 CLA 함량에 비해 낮았고, 그 이유는 식사의 차이 때문인 것으로 추정되었다. 국내에서 제조된 조제분유에서도 cis-9, trans-11 CLA만 동정되었는데, 그 함량은 $2.35{\sim}22.82\;mg/100\;g$으로 평균치는 $17.45{\pm}1.24\;mg/100\;g$이었고, 지방에 함유된 cis-9, trans-11 CLA 함량은 $0.45\;mg/g{\sim}0.85\;mg/g$으로 그 평균치는 $0.65{\pm}0.02\;mg/g$이었다. 영유아가 조제분유 제조사의 지시된 13% 조제분유를 섭취할 경우 cis-9, trans-11 CLA를 2.27 mg 섭취하는 것으로 모유 100 mL에 함유되어 있는 양에 비해 낮다. 따라서 조제분유를 조제할 때 모유와 동일한 cis-9, trans-11 CLA를 섭취할 수 있도록 조제분유를 제조하는 것이 바람직하다.
연구보문 : 수질환경 ; 고성능액체크로마토그래피-유도결합플라즈마 질량분석기를 이용한 어류 중 메틸수은 분석법 확립
유경열 ( Kyung Yoal Yoo ),반경녀 ( Kyeong Nyeo Bahn ),김은정 ( Eun Jung Kim ),김양선 ( Yang Sun Kim ),명정은 ( Jyong Eun Myung ),윤혜성 ( Hae Seong Yoon ),김미혜 ( Mee Hye Kim ) 한국환경농학회 2011 한국환경농학회지 Vol.30 No.3
BACKGROUND: Methylmercury is analyzed by HPLC-ICP/MS because of the simplicity for sample preparation and interference. However, most of the pre-treatment methods for methylmercury need a further pH adjustment of the extracted solution and removal of organic matter for HPLC. The purpose of this study was to establish a rapid and accurate analytical method for determination of methylmercury in fish by using HPLC-ICP/MS. METHOD AND RESULTS: We conducted an experiment for pre-treatment and instrument conditions and analytical method verification. Pre-treatment condition was established with aqueous 1% L-cysteine·HCl and heated at 60℃ in microwave for 20 min. Methylmercury in 50 μL of filtered extract was separated by a C18 column and aqueous 0.1% L-cysteine·HCl + 0.1% L-cysteine mobile phase at 25℃. The presence of cysteine in mobile phase and sample solution was essential to eliminate adsorption, peak tailing and memory effect problems. Correlation coefficient(r2) for the linearity was 0.9998. The limits of detection and quantitation for this method were 0.15 and 0.45 μg/kg respectively. CONCLUSION: Result for analytical method verification, accuracy and repeatability of the analytes were in good agreement with the certified reference materials values of methylmercury at a 95% confidence level. The advantage of the established method is that the extracted solution can be directly injected into the HPLC column without additional processes and the memory effect of mercury in the ICP-MS can be eliminated.
COVID-19 확산방지를 위한 보육시설, 집단급식소 및 식품접객업소 생활방역 매뉴얼 개발
이승완,장혜자,한아름,이선영,김성일,반경녀,Lee, Seung-Wan,Chang, Hye-Ja,Han, Areum,Lee, Sun-Young,Kim, Sung-Il,Bahn, Kyeong-Nyeo 한국급식외식위생학회 2020 급식외식위생학회지 Vol.1 No.1
The virus isolated from patients with severe pneumonia of unknown etiology in Wuhan City, Hubei province in China was termed SARS-CoV-2 and the World Health Organization (WHO) named the disease caused by this virus as coronavirus disease 2019 (COVID-19). The COVID-19 infection has spread rapidly and become a pandemic. In July 2020, there were 13.25 million infected patients and over 570,000 deaths worldwide, and 13,711 infected patients and 294 deaths were reported in South Korea. Since the primary mode of transmission of COVID-19 is through respiratory droplets, the importance of preventive measures, including social distancing, has become important in daily life. In response to the continuous spread of COVID-19, this study developed three guidelines for preventing COVID-19 for the food service industry including childcare centers, institutional foodservices and restaurants by the integration of the manual of controlling foodborne illness. These are included the COVID-19 prevention action methods for food deliverers, for food service administrator, for foodservice works and for customers. All guidelines were designed for easy understanding using illustrations and have been systematically explained subject wise. Thus, these COVID-19 prevention guidelines can be appropriately applied depending on the specific situation and workplace. In addition, they are worthy as educational materials that contribute to the food safety.
퍼지앤트랩 - 기체크로마토그래피(PT - GC)를 이용한 식품첨가물 중 1,4 - 디옥산 및 클로로히드린류 분석
조태용(Tae Yong Cho),신영민(Yeong-Min Sin),반경녀(Kyeong Nyeo Bahn),오세동(Se Dong Oh),이창희(Chang Hee Lee),이영자(Young Ja Lee),문병우(Byung Woo Moon) 한국식품영양과학회 2003 한국식품영양과학회지 Vol.32 No.7
폴리소르베이트류, 염화콜린, 주석산수소콜린, 변성전분 및 향신료 중 1,4-디옥산 및 클로로히드린류의 분석법을 개발하고 확립된 방법으로 잔류량을 조사한 결과는 다음과 같다. 분석에 사용된 트랩으로는 Vocarb 3000이 적합하였고 이때의 검출한계는 DOX 1.38 μg, EPC 0.23 μg, PCH 3.30 μg, ECH 3.97 μg, DCP 20.43 μg이었다. 검체 온도증가와 무수 황산나트륨 농도 증가에 따라 분석감도는 증가하였으나 60℃ 이상에서는 상대표준편차(RSD, %)가 6%를 초과하여 재현성이 떨어져 분석온도를 50℃로 설정하였다. 폴리소르베이트류에서의 회수율은 염을 첨가하지 않고 측정하였을 때 EPC(66%)를 제외하고는 90%이상을 나타내었다. 염화콜린 및 주석산수소콜린의 경우에는 대부분 회수율이 100% 이상이었으나 주석산수소콜린의 EPC는 20%로 낮게 나타났다. 히드록시프로필인산이전분, 히드록시프로필전분 및 찰옥수 수전분에서는 검체를 가수분해한 후 회수율을 측정한 결과 검체종류별 큰 차이없이 회수율이 90% 이상을 나타내었다. 향신료의 분석에서는 무수황산나트륨을 첨가하여 분석한 결과 회수율이 90%이상이었다. 구매한 폴리소르베이트류, 염화콜린, 주석산수소콜린, 향신료 중 1,4-디옥산 및 클로로히드린류를 분석한 결과 트윈 80에서 DOX가 2.5 ppm 검출되었으나 이 외의 검체에서는 모두 불검출되었고 직접 제조한 히드록시프로필전분에서도 모두 불검출되었다. This study has been performed to develope a method for the simultaneous determination of 1,4-dioxane (DOX), epichlorohydrin (EPC), propylene chlorohydrin (PCH), ethylene chlorohydrin (ECH) and 1,3-dichloro-2-propanol (DCP) in polysorbates, chloline chloride, choline bitartrate, modified starch and spices by purge and trap-gas chromatography. Experimental design was used to select a suitable trap by measuring the limit of detection (LOD) and to investigate the effect of temperature and salt of extraction, and the percentage of recovery in various matrix. The LOD of DOX, EPC, PCH, ECH and DCP were 1.38 μg, 0.23 μg, 3.30 μg, 3.97 μg, 20.43 μg respectively, by means of using Vorcarb 3000 trap with 50℃ sample sparger. Excluding EPC, the recoveries of target compounds were above 90% in all matrix. Target compounds in polysorbates (17), choline chloride (5), choline bitartrate (5), modified starch (8) and spices (25) were not detected. But 2.5 ppm of DOX was detected in Tween 80.
이경진(Kyung Jin Lee),강영운(Young Woon Kang),강은귀(Eungui Kang),김미란(Miran Kim),반경녀(Kyeong Nyeo Bahn),장영미(Young Mi Jang),김미혜(Meehye Kim) 한국식품과학회 2010 한국식품과학회지 Vol.42 No.5
본 연구를 통하여 확립된 시험법은 고감도를 가지고 선택성이 뛰어난 LC/MS/MS를 이용하여 한번의 시료전처리와 분석을 통하여 축산식품 중 잔류하는 벤지미다졸계 구충제인 albendazole, fenbendazole, thiabendazole, flubendazole 및 oxibendazole 5종의 잔류량 분석을 가능하게 하였다. 추출용매로 ethyl acetate를 사용하고 MCX 카트리지를 이용하여 정제를 한 시험법으로 Codex guideline(20)에 따라 검량선의 직선성, 회수율, 검출한계 및 정량 한계 등에 대한 실효성을 검증한 결과 검량선은 모두 0.999 이상의 좋은 직선성을 가졌으며 회수율은 albendazole 71-74%, fenbendazole 70-72%, thiabendazole 79-83%, flubendazole 79-83%, oxibendazole 81-86%로 좋은 결과를 얻었다. 또한 검출한계 및 정량한계는 0.01 ppb, 0.03 ppb로 잔류허용기준이 가장 낮은 flubendazole의 10 ppb보다 100배 정도 더 좋은 감도를 가지고 있으며, 소의 근육, 간, 및 천엽에서 MSPD법으로 분석한 실험(21)과 정제 과정 없이 유기용매로 추출하여 LC/MS로 분석한 실험의 회수율 (22)보다 본 연구의 시험법이 더 좋은 회수율을 보여주었다. 또한 확립된 시험법을 이용하여 유통 중인 돼지고기, 쇠고기, 닭고기 총 270건을 수거하여 잔류량을 모니터링 한 결과 경기, 충청, 전라, 경상 지역에서 수거한 돼지고기에서 fenbendazole이 0.0012-0.0031 mg/kg의 수치로 검출이 되었고, 그 검출률은 4.4%이었으나 잔류허용기준인 0.1 mg/kg보다 낮은 수준이었다. 또한 fenbendazole에 대한 노출량 평가 결과 JECFA에서 정하고 있는 ADI의 0.01% 이하로 나타났다. 그러나 축산 농가에서 축산물의 생산량을 높이기 위하여 벤지미다졸계 구충제를 과다 사용하거나 안전휴약기간을 준수하지 않을 경우 축산물의 체내에 잔류가능성이 높기 때문에 지속적인 잔류실태 조사가 수행되어야 할 것으로 사료된다. This research investigated benzimidazole residues (albendazole, fenbendazole, flubendazole, thiabendazole, oxibendazole) in livestock products. A total of 270 samples of livestock products (beef, pork and chicken) were purchased from local markets in Korea. Ethyl acetate was used to extract analytes from the sample, after which ethyl acetate extracts were purified using a MCX cartridge. Analytes were detected using liquid chromatography-tandem mass spectrometry. The limit of detection was 0.01-0.04 ppb, the limit of quantification was 0.03-0.13 ppb, the linearity (r<SUP>2</SUP>) was 0.9992-1.0000, and the recovery was 70-85%. Residues of benzimidazoles, except for fenbendazole in pork, were not found in any of the 270 livestock samples. Fenbendazole was detected in the range of 1.2 to 3.1 ppb in 12 samples of pork.
강은귀(Eun Gui Kang),정용현(Yung Hyeun Jung),정지혜(Ji Hye Jung),김미란(Mi Ran Kim),이경진(Kyung Jin Lee),정진주(Jinjoo Jung),박종석(Jong Seok Park),반경녀(Kyeong Nyeo Bahn),장영미(Young Mi Jang),강찬순(Chan Soon Kang) 한국식품과학회 2010 한국식품과학회지 Vol.42 No.6
기준 설정 전인 2006년 식품의약품안전청에서 실시한 연구과 제의 결과보고서에 의하면 200건 벌꿀 중 네오마이신은 검출되지 않았고, 스트렙토마이신의 경우 23건이 검출되었으며, 아미트라즈(그 대사산물 포함), 코마포스의 경우 각각 10건, 9건의 검출되었다(8). 그러나 기준 설정 후인 본 연구의 모니터링 결과 해당 동물용의약품의 검출율이 현저하게 떨어진 것으로 미루어 볼때 07년 기준 설정 후 설정된 잔류허용기준에 맞춰 관리되고 있음을 알 수 있었다. This research was carried out to investigate residues of neomycin, streptomycin, dihydrostreptomycin, amitraz, 2,4-dimethylaniline (one of amitraz’s metabolites), and coumaphos in honey in order to intensively control their use following the establishment of Korean maximum residue limits (MRLs) for veterinary drugs in honey in 2007. To monitor for residues, 110 honeys and food products with honey were collected and analyzed. The collected honeys included acasia, mixed flower, chestnut, rape flower, jujube, and native types. Neomycin, streptomycin, dihydrostreptomycin, oxytetracycline, and amitraz were not detected among samples. Coumaphos was found in the Korean acasia honey at 0.02 mg/kg, but its concentration was under the MRL (0.1 mg/kg) for coumaphos. According to the results, there were no violations of the Korean MRLs of veterinary drugs in honey.