Determination of Chlorinated Paraffins in Soil by Ultra-high Performance Liquid Chromatography-Electrostatic Field Orbitrap High Resolution Mass Spectrometry
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Determination of Chlorinated Paraffins in Soil by Ultra-high Performance Liquid Chromatography-Electrostatic Field Orbitrap High Resolution Mass Spectrometry
Journal of Instrumental AnalysisVol. 45, Issue 10, Pages: 2101-2109(2026)
LI Yu-xin,WANG Jia-ying,SUN Yu,ZHOU Ting-ting,LI Xin,ZHANG Xu-wen-qi,SHI Ya-li,CAI Ya-qi.Determination of Chlorinated Paraffins in Soil by Ultra-high Performance Liquid Chromatography-Electrostatic Field Orbitrap High Resolution Mass Spectrometry[J].Journal of Instrumental Analysis,2026,45(10):2101-2109.
LI Yu-xin,WANG Jia-ying,SUN Yu,ZHOU Ting-ting,LI Xin,ZHANG Xu-wen-qi,SHI Ya-li,CAI Ya-qi.Determination of Chlorinated Paraffins in Soil by Ultra-high Performance Liquid Chromatography-Electrostatic Field Orbitrap High Resolution Mass Spectrometry[J].Journal of Instrumental Analysis,2026,45(10):2101-2109.DOI: 10.12452/j.fxcsxb.26062201.
Determination of Chlorinated Paraffins in Soil by Ultra-high Performance Liquid Chromatography-Electrostatic Field Orbitrap High Resolution Mass Spectrometry
In this study,a method was established for the simultaneous determination of short-,medium-,and long-chain chlorinated paraffins(SCCPs,MCCPs,and LCCPs) in soil using ultra-high performance liquid chromatography-electrostatic field orbitrap high resolution mass spectrometry(UPLC-Orbitrap HRMS) for highly sensitive detection. The method is based on a pretreatment procedure involving ultrasonic extraction and multi-layer silica gel column cleanup,coupled with optimization of the extraction solvent type,volume,and extraction frequency. Soil samples were subjected to ultrasonic extraction with a dichloromethane/
n
-hexane mixture,followed by multi-layer silica gel column cleanup,elution with dichloromethane/
n
-hexane,and constant-volume adjustment prior to UPLC-Orbitrap HRMS analysis. The chromatographic separation was performed on a Hypersil GOLD VANQUISH C
18
column,and mass spectrometric detection was conducted via a heated electrospray ionization(H-ESI) source in the negative ion mode under full-scan acquisition. SCCPs and MCCPs exhibited good linearity over the range between 10-5 000 ng·mL
-1
,and LCCPs exhibited good linearity over the range between 10-1 000 ng·mL
-1
,with correlation coefficients(
r
2
) greater than 0.98. The method detection limits(MDLs) for SCCPs,MCCPs,and LCCPs were 18.9,19.7,and 2.06 ng·g
-1
,respectively. The average recoveries of CPs at low,medium,and high spiked concentration levels ranged between 75.6%-116%,80.5%-99.3%,and 93.1%-109%,with relative standard deviations(RSDs) of 2.2%-9.3%,3.6%-6.5%,and 1.8%-4.6%,respectively. The developed method was applied to analyze CPs in 11 soil samples collected from a typical rubber industrial park. The detection frequencies of SCCPs,MCCPs,and LCCPs were all 100%,with concentration ranges between 48.5-2 490 ng·g
-1
(me
an 682 ng·g
-1
),82.3-4 090 ng·g
-1
(mean 1 560 ng·g
-1
),and 10.7-809 ng·g
-1
(mean 242 ng·g
-1
),respectively. MCCPs were identified as the predominant congener group,accounting for 62.7% of the total CPs. This method exhibits good reproducibility and high sensitivity,enabling efficient extraction and accurate quantification of CPs in soil,and can serve as a viable analytical option for environmental monitoring and risk assessment.
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