Hearl F J, Manning M P
Am Ind Hyg Assoc J. 1980 Nov;41(11):778-83. doi: 10.1080/15298668091425644.
A gas sampler that operates on the principle of molecular diffusion was analyzed theoretically for its time dependent response. Applying Fick's second law of diffusion and the mathematical procedure of separation of variables and Duhamel's superposition integral, a simple technique is developed to correct concentration measurements for short term sampling and to estimate error when sampling real-time transient atmospheres.
