Syft Technologies Ltd., 3 Craft Place, Christchurch, New Zealand.
Rapid Commun Mass Spectrom. 2010 Jun 30;24(12):1763-9. doi: 10.1002/rcm.4574.
Data are presented for real-time atmospheric monitoring of volatile organic chemicals (VOCs) in air using selected ion flow tube mass spectrometry (SIFT-MS) technology. These measurements were made by one of the new generation of SIFT-MS instruments. Results are shown for five VOCs that were continually monitored from a stationary sampling point over a 4-day period: ethene, ethanol, 1,3-butadiene, benzene and toluene. All analytes except ethene in the study have at least two simultaneous and independent measures of concentration. These results demonstrate the great advances in SIFT-MS that have been made in recent years. 1,3-Butadiene is measured at a concentration of 9 pptv with a precision of 44%. For a 1-s integration time, a detection limit of 50 pptv is achieved. Instrument sensitivities are reported for all five analytes.
本文介绍了使用选定离子流管质谱（SIFT-MS）技术实时监测空气中挥发性有机化合物（VOCs）的方法。这些测量是使用新一代 SIFT-MS 仪器之一进行的。结果显示了连续 4 天从固定采样点监测的 5 种 VOCs（乙烯、乙醇、1,3-丁二烯、苯和甲苯）的情况。除乙烯外，本研究中的所有分析物都至少有两种同时且独立的浓度测量值。这些结果证明了近年来 SIFT-MS 技术取得的重大进展。1,3-丁二烯的浓度以 9 pptv 的精度测量为 44%。在 1 秒的积分时间内，可实现 50 pptv 的检测限。本文还报告了所有 5 种分析物的仪器灵敏度。
