Analysis of Total Petroleum Hydrocarbon Fractions in Soils by Gas Chromatography: Standardized Calibration and Quantitation Method

Yu-long LIU; Yan-gao HUANG; Fei LIU

doi:10.15898/j.cnki.11-2131/td.201709040139

2019 Vol. 38, No. 1

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Article navigation > Rock and Mineral Analysis > 2019 > 38(1): 102-111

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Yu-long LIU, Yan-gao HUANG, Fei LIU. Analysis of Total Petroleum Hydrocarbon Fractions in Soils by Gas Chromatography: Standardized Calibration and Quantitation Method[J]. Rock and Mineral Analysis, 2019, 38(1): 102-111. doi: 10.15898/j.cnki.11-2131/td.201709040139

Citation:

Yu-long LIU, Yan-gao HUANG, Fei LIU. Analysis of Total Petroleum Hydrocarbon Fractions in Soils by Gas Chromatography: Standardized Calibration and Quantitation Method[J]. Rock and Mineral Analysis, 2019, 38(1): 102-111. doi: 10.15898/j.cnki.11-2131/td.201709040139

Analysis of Total Petroleum Hydrocarbon Fractions in Soils by Gas Chromatography: Standardized Calibration and Quantitation Method

1.
State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China
2.
Research Institute of Safety and Environment Technology, China National Petroleum Corporation, Beijing 102206, China
3.
Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences(Beijing), Beijing 100083, China
4.
The Eighth Geological Brigade of Hubei Geological Bureau, Xiangyang 441000, China

Received Date: 04 September 2017

Revised Date: 22 July 2018

Accepted Date: 02 November 2018

Abstract

Abstract

BACKGROUNDInter-laboratory measurement results of total petroleum hydrocarbons (TPH) in soils determined by current Gas Chromatography-Flame Ionization Detector, are not comparable due to specified TPH ranges of alkanes and/or different calibration standards between laboratories. OBJECTIVESTo establish a standardized calibration and quantitation method of TPH and to develop the adjacent-peak calibration and quantitation method (APCQM). METHODSThe APCQM mainly includes:(1) defining TPH range as all compounds eluting between n-hexane and n-tetracontane; (2) division of TPHs into volatile petroleum hydrocarbons (VPH) and semivolatile petroleum hydrocarbons (SPH). Specify and calibrate procedure of TPH. Reference materials (RM) for VPH are 5 n-alkanes, from n-hexane to n-decane, whereas SPH RMs are 31 n-alkanes, from n-decane to n-tetracontane. Calibration equations of peak area and concentration of n-alkanes can be constructed by average response factor or linear regression methods; (3) quantitative concentrations of all target chromatographic peaks acquired by adjacent standard peak calibration; (4) calculation of the contents of n-alkanes, TPH and optional TPH fractions. RESULTSUsing the normal calibration and quantitation method, TPH recoveries of laboratory fortified blanks and laboratory fortified sample matrices could be underestimated or overestimated by 10%. By using the APCQM the paradox in quality control processes was resolved, and thus reliable measurement results of TPH were obtained in laboratories. CONCLUSIONSThe APCQM is applicable to standardization analysis of TPH fractions in environmental samples.
- total petroleum hydrocarbon /
- fraction /
- Gas Chromatography /
- standardization

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References

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