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© Oxford University Press

Short algorithm to compensate for sampling-volume errors in diffusion-cell studies

George H. Dibdin

MRC Dental Group, The Dental School Lower Maudlin Street, Bristol BS1 2LY, UK

This communication describes a short algorithm enabling arbitrarily large but equal samples to be taken from the two chambers of a diaphragm diffusion cell without introducing any systematic error. It creates a transformed time-scale, dependent on sampling volume, which linearizes the output, fits this to a straight line by simple linear regression, and computes the diffusion coefficient from the slope. The advantages of sampling equal fractions from both chambers are discussed in terms of the greater precision this allows. The procedure may have uses in other fields.

Received on March 25, 1992; accepted on May 14, 1992

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