TBS FROST Data from 2023 at SGP C1

The FROST provides chemical analysis of four time-resolved sorbent samples on a LECO GCxGC Bench Time of Flight Mass Spectrometer, using a Gerstel MPS Thermal Desorption System. Samples collected via FROST can be analyzed on one of two Sandia National Laboratories' instruments. One instrument will provide ultra-high mass spectrometer resolution (up to four decimal points or m/z data) and can be used for identification of true unknowns. Data can include suspected formulas of species not included in any current mass spectra database. This instrument also has a low limit of detection of known species (tens of femtogram range). The second instrument can provide an order of magnitude lower limits of detection (into the single-digit femtogram range) for known species currently in mass spectra databases. This system is also more resilient to environmental samples that contain higher levels of moisture.

FROST利用Gerstel MPS热脱附系统（Gerstel MPS Thermal Desorption System），在LECO GCxGC Bench飞行时间质谱仪（LECO GCxGC Bench Time of Flight Mass Spectrometer）上对四个时间分辨吸附剂样本进行化学分析。通过FROST采集的样本可在桑迪亚国家实验室（Sandia National Laboratories）的两台仪器之一上进行分析。其中一台仪器可提供超高质谱分辨率（最高达四位小数或质荷比数据，m/z data），并可用于真正未知物的鉴定。数据可包含当前任何质谱数据库中未收录物种的疑似分子式。该仪器对已知物种的检测限也较低（数十飞克范围）。第二台仪器对当前质谱数据库中的已知物种可提供低一个数量级的检测限（进入个位数飞克范围）。该系统对含水量较高的环境样本也具有更强的耐受性。