期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1596, 期 -, 页码 20-29出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2019.03.001
关键词
Coated direct inlet probe; Mass spectrometry; Polycyclic aromatic hydrocarbons; Fast quantitation
资金
- National Key Research and Development Program of China [2016YFD0400404]
- National Natural Science Foundation of China [31601432]
The coated direct inlet probe (CDIP) is a new laboratory-made low-cost technology developed from a direct inlet probe (DIP), which has the advantage of quick enrichment/cleanup of an analyte from liquid samples. A capillary probe is coated with hydroxy-terminated polydimethylsiloxane (OH-PDMS), divinyl-benzene (DVB), and beta-cyclodextrin (beta-CD) by a sol-gel method. This probe can be directly coupled with a commercialized atmospheric-pressure chemical ionization (APCI) ion source and high-resolution mass spectrometry, which are widely applicable, reliable, and durable. The ability to perform quantitative analyses with the use of a stable-isotope-labeled internal standard (SIL-IS) was tested by using different concentrations of acenaphthylene (ACY), acenaphthene (ACP), fluorene (FLR), fluoranthene (FLT), phenanthrene (PHE), and benzo[a]pyrene (B[a]P). Calibration curves with a coefficient of determination of R-2 >= 0.9982 for different polycyclic aromatic hydrocarbons (PAHs) were obtained. A limit of detection (LOD) of 0.008-0.04 ng mL(-1) for PAHs was determined. The entire workflow is solvent-free and can be completed in less than 5 min, which demonstrates the advantages of this technique for quantitative analysis. (C) 2019 Elsevier B.V. All rights reserved.
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