Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Determination of bromate in bottled mineral water in Korea

먹는 샘물 중 bromate 분석 및 분포 특성

  • Ahn, Hye-Sil (Drinking Water Research Division, National Institute of Environmental Research) ;
  • Kim, Hyun-Koo (Drinking Water Research Division, National Institute of Environmental Research) ;
  • Park, Ju-Hyun (Drinking Water Research Division, National Institute of Environmental Research) ;
  • Jung, Dong-Il (Drinking Water Research Division, National Institute of Environmental Research) ;
  • Kim, Tae-Seung (Drinking Water Research Division, National Institute of Environmental Research)
  • 안혜실 (국립환경과학원 물환경연구부 먹는물연구과) ;
  • 김현구 (국립환경과학원 물환경연구부 먹는물연구과) ;
  • 박주현 (국립환경과학원 물환경연구부 먹는물연구과) ;
  • 정동일 (국립환경과학원 물환경연구부 먹는물연구과) ;
  • 김태승 (국립환경과학원 물환경연구부 먹는물연구과)
  • Received : 2010.04.01
  • Accepted : 2010.04.05
  • Published : 2010.04.25
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Abstract

This study was performed to compare international analytical methods of bromate and applied to determine bromate in bottled mineral water in Korea. Bromate in bottled mineral water was eluted by 10~50 mM potassium hydroxide (KOH) and determined by ion chromatograph-suppressed conductivity detector (ICCD). Sample was purified with on guard Ba-, Ag- and H-cartridges and $0.2\;{\mu}m$ membrane filter. The method detection limit (MDL) and the limit of quantitation (LOQ) of bromate were 0.1 and $0.5\;{\mu}g/L$, respectively. The calibration curve showed good lineality above 0.9998 in the ranges of the $0.5\sim40\;{\mu}g/L$. Bromate from 33 samples among total 157 bottled mineral water samples was detected in the concentration range of $0.5\sim6.5\;{\mu}g/L$. The detected concentrations were within bottled mineral water quality criteria ($10\;{\mu}g/L$) in Korea.

먹는 물 중 bromate의 국내 외 시험방법에 대한 분석 조건을 비교하여 최적 시험조건을 확인하고 ion chromatograph-suppressed conductivity detector (IC-CD)를 사용하여 먹는 샘물 중 bromate 함량을 분석하였다. 시료 전처리를 위해 먹는 샘물 20 mL를 온가드 Ba-, Ag-, H-카트리지 순서대로 통과시키고 마지막에 $0.2\;{\mu}m$ 맴브레인 필터로 여과 하였다. 여과한 시료는 IC-CD에 주입하였으며, 시료 중 bromate는 10~50 mM의 KOH 이동상 및 수산화이온용액 이동상에 적합한 가드 및 분석용 컬럼인 AG 19 및 AS 19에 의해 분리하였다. Bromate의 검정 곡선은 $0.5\sim40\;{\mu}g/L$의 농도 범위에서 $r^2$값이 0.9998로 좋은 직선성을 보였으며, 방법검출한계(MDL) 및 정량한계(LOQ)는 각각 0.1, $0.5\;{\mu}g/L$이었다. 2009년 9월 이후 유통 중인 먹는 샘물 157 개 시료를 분석한 결과, 33 개 시료에서 bromate가 검출되었으며, 검출된 시료의 평균농도는 $2.4\;{\mu}g/L$ 이었다. 측정 농도 범위는 $0.5\sim6.5\;{\mu}g/L$로 모두 국내 먹는샘물 수질기준인 $10\;{\mu}g/L$ 이내였다.

Keywords

References

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