Determination of 2-Bromostyrene in Water by Headspace Solid-Phase Microextraction Coupled with Gas Chromatography-Mass Spectrometry
A highly sensitive analytical method for the determination of 2-bromostyrene in tap water and surface water was developed and optimized using headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS). The extraction conditions were systematically optimized via single-factor experiments and an L9(34) orthogonal array with range analysis. The optimal conditions were: sample volume 10 mL, extraction time 30 min, extraction temperature 30 °C, stirring rate 1000 r·min−1, and 2.5 g NaCl as salting-out agent. The method exhibited good linearity over the range 100–5000 ng·L−1 (R² = 0.9994), with a detection limit of 13.8 ng·L−1 and a quantification limit of 55.3 ng·L−1. Recoveries from spiked tap water and surface water samples ranged from 90.2% to 102.2%, with relative standard deviations between 5% and 11%. Statistical tests (normal distribution, F-test, t-test) all yielded P > 0.05, confirming the method's reliability. The method is simple, sensitive, and exhibits minimal matrix effects, making it suitable for routine monitoring of trace 2-bromostyrene in drinking water and surface water.