Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Heavy Metal Contents of Vegetables Available on the Markets in Seoul

서울에서 유통 중인 채소류의 중금속 함량에 관한 연구

  • Choi, Chae-Man (Kangnam Agricultural Products Inspection Team, Kangnam Agro-marin Products Inspection Center, Research Institute of Public Health & Environmen) ;
  • Choi, Eun-Jung (Kangnam Agricultural Products Inspection Team, Kangnam Agro-marin Products Inspection Center, Research Institute of Public Health & Environmen) ;
  • Kim, Tae-Rang (Kangnam Agricultural Products Inspection Team, Kangnam Agro-marin Products Inspection Center, Research Institute of Public Health & Environmen) ;
  • Hong, Chae-Kyu (Kangnam Agricultural Products Inspection Team, Kangnam Agro-marin Products Inspection Center, Research Institute of Public Health & Environmen) ;
  • Kim, Jung-Hun (Kangnam Agricultural Products Inspection Team, Kangnam Agro-marin Products Inspection Center, Research Institute of Public Health & Environmen)
  • 최채만 (서울시보건환경연구원 강남농수산물검사소 농산물검사팀) ;
  • 최은정 (서울시보건환경연구원 강남농수산물검사소 농산물검사팀) ;
  • 김태랑 (서울시보건환경연구원 강남농수산물검사소 농산물검사팀) ;
  • 홍채규 (서울시보건환경연구원 강남농수산물검사소 농산물검사팀) ;
  • 김정헌 (서울시보건환경연구원 강남농수산물검사소 농산물검사팀)
  • Received : 2010.09.13
  • Accepted : 2010.11.08
  • Published : 2010.12.31
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Abstract

This study was conducted to estimate the heavy metal contents of vegetables available on the markets in Seoul area. Concentrations of mercury (Hg), lead (Pb), cadmium (Cd), arsenic (As), chrome (Cr), nickel (Ni), copper (Cu), and zinc (Zn) were measured in 300 samples using a mercury analyzer and inductively coupled plasma optical emission spectrometer (ICP-OES) after wet digestion. The average values of heavy metals in vegetables were as follows [mean (minimum~maximum), mg/kg]; Hg: 0.0005 (N.D~0.007), Pb: 0.011 (N.D~0.259), Cd: 0.012 (N.D~0.188), As: 0.002 (N.D~0.142), Cr: 0.100 (0.019~0.954), Ni: 0.093 (0.003~1.231), Cu: 1.098 (0.072~36.29), and Zn: 3.48 (0.485~21.31). The heavy metal contents of vegetables available on the markets in Seoul were almost the same as or lower than those reported in other studies. The weekly average intakes of mercury, lead and cadmium from vegetables take 0.44~7.71% of PTWI (Provisional Tolerable Weekly Intakes) that the FAO/WHO Joint Food Additive and Contaminants Committee sets for evaluation of food safety.

본 연구에서는 서울지역에서 유통되고 있는 소비량이 많은 채소류의 중금속 함량을 조사해 국외기준과 비교하여 그 안전성을 평가하였다. 전국에서 재배되어 서울에서 유통되고 있는 채소류 20종 300건을 2009년 1월부터 10월까지 구입하여 중금속 8종(수은, 납, 카드뮴, 비소, 크롬, 니켈, 구리, 아연)을 수은분석기 및 ICP-OES를 이용하여 분석하였다. 시료의 분해는 산분해법을 이용하였으며 분석 장비로 사용된 ICP-OES 및 수은 분석기의 검출한계와 정량한계는 각각 0.0002~0.0018 mg/kg 및 0.0009~0.0065 mg/kg으로 감도가 높았다. 채소류 중 중금속 함량[평균(최소~최대), mg/kg]은 수은 0.0005(N.D~0.007), 납 0.011(N.D~0.259), 카드뮴 0.012(N.D~0.188), 비소 0.002(N.D~0.142), 크롬 0.100(0.019~0.954), 니켈 0.093(0.003~1.231), 구리 1.098(0.072~36.29), 아연 3.480(0.485~21.31)이었다. 본 연구를 통해 얻어진 결과들 중 수은, 납, 카드뮴, 비소, 구리, 그리고 아연은 기존 연구들과 유사하였으며 크롬, 니켈은 낮은 수준이었다. 납과 카드뮴의 경우 채소류 중 중금속 기준을 초과한 것은 한 건도 없었다. 또한 2005년 국민영양조사 결과보고서의 1일 섭취량을 근거로 FAO/WHO의 중금속 잠정주간섭취허용량과 비교하면 Hg, Pb 및 Cd는 각각 0.44%, 1.98% 및 7.71%의 낮은 수준으로 식이를 통한 안전에는 문제가 없는 것으로 판단된다. 본 연구 결과는 아직 세부 기준이 설정되지 않은 채소류에 대한 중금속 기준을 설정하는데 있어 과학적 근거 자료로 활용될 수 있을 것으로 기대된다.

Keywords

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