1.国科大杭州高等研究院 环境学院,全省新污染物环境与健康重点实验室,浙江 杭州 310024
2.中国科学院生态环境研究中心,环境化学与环境毒理全国重点实验室,北京 100085
3.中国科学院大学,北京 100049
4.浙江省生态环境科学设计研究院,全省新污染物环境与健康重点实验室,浙江 杭州 310007
史亚利,博士,研究员,研究方向:新污染物分析方法和环境行为,E-mail:shiyali@rcees.ac.cn
收稿:2026-06-22,
修回:2026-08-04,
录用:2026-08-07,
网络首发:2026-08-19,
纸质出版:2026-10-15
移动端阅览
李玉欣,王嘉莹,孙瑜,周婷婷,李欣,张许文琦,史亚利,蔡亚岐.超高效液相色谱-静电场轨道阱高分辨质谱法测定土壤中氯化石蜡[J].分析测试学报,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.
李玉欣,王嘉莹,孙瑜,周婷婷,李欣,张许文琦,史亚利,蔡亚岐.超高效液相色谱-静电场轨道阱高分辨质谱法测定土壤中氯化石蜡[J].分析测试学报,2026,45(10):2101-2109. DOI: 10.12452/j.fxcsxb.26062201.
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.
该研究基于超声萃取和多层硅胶柱净化的前处理方法,通过优化萃取剂种类、用量和萃取次数,结合超高效液相色谱-静电场轨道阱高分辨质谱(UPLC-Orbitrap HRMS),建立了同时分析土壤中短、中、长链氯化石蜡(SCCPs、MCCPs、LCCPs)的方法。土壤样品经二氯甲烷/正己烷超声萃取、多层硅胶柱净化、二氯甲烷/正己烷洗脱浓缩定容后,进行UPLC-Orbitrap HRMS分析。色谱分离采用Hypersil GOLD VANQUISH C
18
色谱柱,质谱检测采用加热电喷雾离子源(H-ESI)负离子电离模式和全扫描监测模式。结果表明,SCCPs、MCCPs在10~5 000 ng·mL
-1
、LCCPs在10~1 000 ng·mL
-1
范围内线性关系良好,相关系数(
r
2
)均大于0.98。SCCPs、MCCPs、LCCPs的方法检出限(MDL)分别为18.9、19.7、2.06 ng·g
-1
。在低、中、高3个加标水平下,氯化石蜡(CPs)的加标回收率分别为75.6%~116%、80.5%~99.3%和93.1%~109%,相对标准偏差(RSD)分别为2.2%~9.3%、3.6%~6.5%和1.8%~4.6%。应用该方法对某橡胶企业园区11个土壤样品中的CPs进行检测,SCCPs、MCCPs和LCCPs的检出率均为100%,检出量分别为48.5~2 490 ng·g
-1
(均值为682 ng·g
-1
)、82.3~4 090 ng·g
-1
(均值为1 560 ng·g
-1
)和10.7~809 ng·g
-1
(均值为242 ng·g
-1
),其中MCCPs为主要污染物,占CP
s的62.7%。该方法重现性良好、灵敏度高,能够高效萃取并准确定量土壤中CPs,可为环境监测与风险评估提供方法选择。
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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