Tedlar bags are a popular medium for collecting air samples because they are light, portable, and inexpensive. However, Tedlar bags are semi-permeable and samples must be tested shortly after collection to maintain the integrity of the sample. This time range is usually between 24 and 72 hours, depending on the analyte of interest and method compliance. Automated samplers help laboratories meet the required fast turnaround and eliminate differences in operator sampling, thereby improving reproducibility.