The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Effect of Different GC Columns on the Quantitative Analysis of Long Chain Alkyl Diols (LCDs)

특성이 다른 GC 컬럼이 long chain alkyl diols (LCDs)의 정량 분석에 미치는 영향

  • GAL, JONG-KU (Hanyang University, Department of Marine Science and Convergent Technology) ;
  • KIM, JUNG-HYUN (Korea Polar Research Institute, Division of Polar Paleoenvironment) ;
  • NAM, SEUNG-IL (Korea Polar Research Institute, Division of Polar Paleoenvironment) ;
  • SHIN, KYUNG-HOON (Hanyang University, Department of Marine Science and Convergent Technology)
  • 갈종구 (한양대학교 해양융합과학과) ;
  • 김정현 (극지연구소 극지고환경연구부) ;
  • 남승일 (극지연구소 극지고환경연구부) ;
  • 신경훈 (한양대학교 해양융합과학과)
  • Received : 2017.02.01
  • Accepted : 2017.03.24
  • Published : 2017.05.31
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Abstract

Long chain alkyl diols (LCDs) have been reported in sediments from various marine environments. Rampen et al. (2012) introduced the paleo-sea surface temperature (SST) proxy, Long chain Diol Index (LDI) based on the relative abundance of $C_{30}$ 1,15-diol, $C_{28}$ 1,13-diol, and $C_{30}$ 1,13-diol. In general, CP-Sil5CB and DB-5ms columns have been used for the quantitative and qualitative analysis of LCDs with a GC-MS. In this study, we examined the effect of three different columns (CP-Sil5CB, HP-5ms and DB-5) on the quantitative analysis of LCDs using marine sediments from the East Sea of Korea and the western Arctic Ocean. In general, our study showed that the results of CP-Sil5CB differed significantly from those of HP-5ms and DB-5. However, the differences of the LDI-derived SSTs among three columns were $0.1-0.2^{\circ}C$ for the East Sea and $0.2-0.7^{\circ}C$ for the western Arctic Ocean, which were well within the calibration error range (${\pm}1{\sigma}$). Accordingly, our study showed that the use of different columns resulted in significant differences of LCDs concentrations, but its effect on the LDI was relatively insignificant. Therefore, it appears that the different columns can be used for the paleo-SST reconstruction in the East Sea and the western Arctic Ocean using the LDI proxy.

Long chain alkyl diols (LCDs)은 다양한 해양 환경 퇴적물에서 관측되고 있다. Rampen et al. (2012)은 해양 표층 퇴적물에서 분석된 LCDs 중 $C_{30}$ 1,15-diol, $C_{28}$ 1,13-diol, $C_{30}$ 1,13-diol를 이용하여 Long chain Diol Index (LDI)라는 고수온 프록시를 제시하였다. 일반적으로 LCDs의 정성 및 정량 분석은 CP-Sil5CB와 DB-5ms 컬럼을 사용해 GC-MS를 주 기반으로 한다. 본 연구에서는 서로 다른 해양환경(동해 및 서북극해)에서 획득한 해양퇴적물을 활용하여 특성이 다른 세가지 GC 컬럼(CP-Sil5CB, HP-5ms, DB-5)이 LCDs의 정량 분석에 미치는 영향을 검토하였다. 본 연구를 통해 일반적으로 CP-Sil5CB로 분석된 농도 결과가 HP-5ms와 DB-5로 분석된 농도 결과와 통계적으로 유의한 차이가 있는 것으로 확인되었다. 하지만 LDI로 복원된 표층수온의 컬럼 간 편차는 동해 퇴적물의 경우 $0.1-0.2^{\circ}C$, 서북극해 퇴적물의 경우 $0.2-0.7^{\circ}C$로 LDI의 calibration error 범위(${\pm}1{\sigma}$) 보다 작았다. 결론적으로 본 연구는 컬럼에 따라 LCDs의 정량 결과는 현저한 차이를 보일 수 있지만, LDI 프록시 값에 미치는 영향은 상대적으로 미비함을 보여 주었다. 따라서 LDI 프록시를 활용한 동해 및 서북극 해양 퇴적물의 고수온 복원에 특성이 다른 컬럼을 사용 할 수 있음을 시사하였다.

Keywords

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