SCHEDULED MAINTENANCE:
Equipment is described that allows diffusion assays to be performed automatically in Petri dishes using the punch-hole technique. With a block of six dishes limits of error of approximately ±2% can be obtained consistently. Various sources of systematic errors and their elimination are discussed.
J. W. Lightbown, R. A. Broadbridge, P. Isaacson, J. E. Sharpe and A. Jones, Analyst, 1979, 104, 201 DOI: 10.1039/AN9790400201
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