I'm doing a lab (Extended Essay, if you're familiar with the IB program) on the local air quality. I basically would need to collect some air samples to test, but I'm not sure how I would go about collecting appropriate samples of air. I'm also not sure in what sort of container I could place them in. The container has to be transparent since I will be shooting an infrared beam through the air sample. So, how could I go about collecting air samples, and what kind of containers do you suggest I get/make? I've got the rest of the lab set-up, but I'm stumped on how I would collect air samples. I guess I could just use ziplock bags and fill them with the 'air' in different areas of the city, but I'm not sure if that'd work. ANY ideas will be greatly appreciated.