TABLE 1.

Sampling and endotoxin extraction methods for sawmills and swine barns

Type of sampling and location	Sampling method	Flow rate (liters/min)	Mean vol of air sampled (liters)	Extractiona
				Container	Method
Impinger sampling of sawmills and swine barns	AGI, 20.0 ml of pyrogen-free saline	12.5	200	Polypropylene tube	Vortex mixer, 10 min, 20°C
Filter sampling
Sawmills	0.8-μm-pore-size PVCb filter, IOM inhalable dust cassette	2.0	862 ± 158	Polypropylene tube	Sonication bath, 1 h, 20°C
Swine barns	0.8-μm pore-size PVC filter, closed-face cassette	1.5	361 ± 3	Borosilicate glass jar	Shaking bath, 16 h, 37°C

^aThe extraction solution was pyrogen-free water with 0.04% Tween 80 in each case. 

^bPVC, polyvinyl chloride.