Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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Comparison of Liquid Chromatography-Mass/Mass Spectrometry (MS) and Gas Chromatography-MS for Quantitative Analysis of Indole-3-acetic acid and Indole-3-butyric acid from the Concentrated Liquid Fertilizer

Liquid Chromatography-Mass/Mass Spectrometry (MS)와 Gas Chromatography-MS를 이용한 농축 액상 비료제품 중 Indole-3-acetic acid 및 Indole-3-butyric acid 정량분석능 비교

  • Kim, Jin Hyo (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Jong Min (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Choi, Geun-Hyoung (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Yun-Ki (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Im, Geon-Jae (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Doo-Ho (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kwon, Oh-Kyung (Chemical Safety Division, National Academy of Agricultural Science, Rural Development Administration)
  • Received : 2012.10.04
  • Accepted : 2012.12.11
  • Published : 2013.03.31
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Abstract

In here, we investigated the quantitative analysis method of indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) with liquid chromatography-mass/mass spectrometry (LC-MS/MS) or gas chromatography-MS. Two ways of clean-up process were investigated for LC-MS/MS instrumental analysis of IAA, but both a simple dilution and hydrophile-lipophile balance (HLB) solid phase extraction (SPE) were not met the optimal recovery rates for quantitative analysis. On the other hand, the clean-up method for GC-MS was finally optimized through HLB-SPE from 250-folds diluted sample and methylation with trimethylsilyl chloride in methanol for 4 h. The limit of detection for methyl ester of IAA and IBA were both 1.4 mg/L, and recovery rates showed 93-107% from the concentrated liquid fertilizer.

비료제품에는 의도적 혹은 비의도적으로 농약으로 등록된 indole-3-acetic acid (IAA) 및 indole-3-butyric acid (IBA)성분에 대한 잔류 가능성이 꾸준히 제기되고 있으나, 생장조정제가 아닌 비료제품에서 mg/L 수준의 옥신류 잔류분석법이 마련되어 있지 않았다. 따라서, 본 연구에서는 생체시료에 미량 잔류하는 IAA 및 IBA 분석에 사용되어 온 liquid chromatography-mass/mass spectrometry (LC-MS/MS)와 gas chromatography-MS 기기분석법을 활용하여 농축 액상비료제품에 적용할 수 있는지 조사하였으며, 액상 비료제품에 적용 가능한 정밀기기 분석법을 개발하고자 하였다. 수용액 상태의 시료에서 식물 생장호르몬인 IAA와 IBA를 가장 손쉽게 정제할 수 있는 방법으로 hydrophile-lipophile balance (HLB) solid phase extraction를 활용하였으나, 제한된 조건에서 LC-MS/MS를 통한 정량분석은 적합한 회수율을 확보하지 못하였고, 정성분석만 가능함을 확인하였다. 반면, 비료제품 250배 희석액을 사용하여 HLB 정제, trimethylsilyl chloride을 이용한 methylation을 통한 GC-MS 분석에서는 검출한계 1.4 mg/L과 93-107%의 회수율로 액상 비료제품에서 IAA와 IBA 정량분석법을 확립할 수 있었다.

Keywords

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