1.河海大学 环境学院,江苏 南京 210098
2.河海大学 浅水湖泊综合治理与资源开发教育部重点实验室, 江苏 南京 210098
3.太湖流域水文水资源监测中心(太湖流域水环境监测中心),江苏 无锡 214024
石亚东,硕士,正高级工程师,研究方向:水文水资源、水情分析,E-mail:taihu2790@qq.com
纸质出版日期:2024-04-15,
收稿日期:2023-11-27,
修回日期:2024-01-18,
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李丰铎,王洵,石亚东,李涛,钱进.气相色谱-串联质谱法测定水中29种致嗅物质[J].分析测试学报,2024,43(04):582-589.
LI Feng-duo,WANG Xun,SHI Ya-dong,LI Tao,QIAN Jin.Determination of 29 Odor-causing Substances in Water by Gas Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2024,43(04):582-589.
李丰铎,王洵,石亚东,李涛,钱进.气相色谱-串联质谱法测定水中29种致嗅物质[J].分析测试学报,2024,43(04):582-589. DOI: 10.12452/j.fxcsxb.23112719.
LI Feng-duo,WANG Xun,SHI Ya-dong,LI Tao,QIAN Jin.Determination of 29 Odor-causing Substances in Water by Gas Chromatography-Tandem Mass Spectrometry[J].Journal of Instrumental Analysis,2024,43(04):582-589. DOI: 10.12452/j.fxcsxb.23112719.
采用顶空箭型固相微萃取(HS-Arrow-SPME)与气相色谱-串联质谱(GC-MS/MS)技术,建立了水中29种致嗅物质的快速检测方法。通过优化前处理条件和GC-MS/MS参数,选择10 mL水样加入顶空瓶中,于70 ℃条件下,通过3.5 g氯化钠盐析辅助预孵化8 min,然后以二乙烯基苯/羟基/聚二甲基硅氧烷(DVB/Carbon WR/PMDS)Smart SPME Arrow箭型固相萃取头萃取20 min,于240 ℃进样口处解吸3 min。目标物采用VF-624 MS色谱柱(30 m×0.25 mm×1.4 μm)进行分离,多反应监测(MRM)模式下进行检测。结果表明,水中29种致嗅物质在5
~
300 ng/L范围内线性良好,相关系数(
r
2
)均大于0.991,方法检出限和定量下限分别为0.31
~
9.27 ng/L和1.26~37.09 ng/L。以超纯水为空白基质,在10、80、160 ng/L加标水平下,各目标物的回收率为84.3%
~
112%,相对标准偏差(RSD,
n
=6)为0.10%
~
8.6%。该方法已用于实际水样中29种目标物的测定,可满足痕量致嗅物质的检测要求。
A rapid method was developed for the determination of 29 odor-causing substances in water using headspace-arrow-solid-phase microextraction(HS-Arrow-SPME) coupled with gas chromatography-tandem mass spectrometry(GC-MS/MS). By optimizing the pretreatment conditions and GC-MS/MS parameters,10 mL of water samples were selected to be added into a headspace vial,pre-incubated at 70 ℃ for 8 min with the assistance of 3.5 g NaCl salting-out,then extracted with a DVB/Carbon WR/PMDS Smart SPME Arrow extraction head for 20 min,and finally desorbed at the inlet of 240 ℃ for 3 min. The GC-MS/MS platform was configured with a VF-624 MS column(30 m×0.25 mm×1.4 μm) and detected in multiple reaction monitoring(MRM) mode. The results showed that the linearity of the 29 odor-causing substances in water was good in the ranges of 5-300 ng/L with correlation coefficients(
r
2
) greater than 0.991. The limits of detection and the limits of quantitation ranged of 0.31-9.27 ng/L and 1.26-37.09 ng/L,respectively. The recoveries of 29 odor-causing substances spiked with the ultra-pure water as the blank matrix at spiked levels of 10,80,and 160 ng/L were in the ranges of 84.3%-112%,and the relative standard deviations(RSDs,
n
=6) were in the ranges of 0.10%-8.6%. The method has been used for the determination of 29 targets in real water samples and can meet the requirements for the detection of trace odor-causing substances.
顶空箭型固相微萃取气相色谱-串联质谱水致嗅物质
HS-Arrow-SPMEGC-MS/MSwaterodor-causing substance
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