AI Article Synopsis
- LC-MS is commonly used to detect pesticide residues, but traditional methods struggle with low-polarity pesticides due to sensitivity issues.
- A new device called PENG-ESI utilizes plasma-excited nebulizer gas to enhance the detection of low-polarity pesticides while still effectively analyzing polar ones.
- This method achieved a detection limit of 100 pg/g for S-bioallethrin with excellent accuracy and minimal matrix effects, indicating promise for food safety and environmental monitoring.
Article Abstract
Liquid chromatography-mass spectrometry (LC-MS) is widely used in the detection of pesticide residues. However, the detection sensitivity of low-polarity pesticides by commonly used electrospray ionization may be severely suppressed, which greatly affects the limit of detection and repeatability. Herein, a plasma-excited nebulizer gas-assisted electrospray ionization (PENG-ESI) device has been developed. By introducing the discharge plasma formed by Tesla coil into the electrospray nebulizer gas channel, the sensitivity of low-polarity pesticides was significantly increased while maintaining sensitivity to polar pesticides. Under the optimized conditions, the limit of detection for S-bioallethrin was achieved at the level of 100 pg/g with good linearity ( > 0.99) and precision (RSD ≤ 4.61%). The matrix effect of a series of spiked matrix samples is less than 13.1%. Finally, different pyrethroid pesticide residues were successfully analyzed without separation, highlighting that the technology has potential application prospects in food quality control, environmental monitoring, and other fields.
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| http://dx.doi.org/10.1021/acs.analchem.3c01502 | DOI Listing |
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