Analysis of TO-15/TO-17 air toxics and beyond in urban air using TD-GC/TOF MS

摘要

These examples have shown how recent advances in air monitoring technology have extended the range and robustness of GC-based analytical procedures for air samples collected using either canisters or sorbent tubes. Some of the potential applications and advantages that have been explored here, include automated screening of uncharacterized canister samples, reliable detection of very low-concentration species and technologies to facilitate transition from canisters to sorbent tubes, with the employment of simple grab sampling devices. With the advancement of air sampling techniques and technology excellent linearity and detection methods are available to ensure laboratory inaccuracies are minimized. The greatest area for inaccuracy when making ambient air measurements now lies with the sample collection itself. This paper has discussed the two main sampling types for VOC collection, canister sampling and absorbent tube sampling and it is important to ensure that when taking the sample the correct collection method is employed.