Gilson is a laboratory-instrument manufacturer and the corporate author of Gilson Guide to Pipetting. In this bibliography, the name identifies the company, rather than an individual researcher. The guide documents small-volume liquid handling, especially the relation between a pipette setting, the liquid actually delivered, and experimental reproducibility.[ref]
Gilson Guide to Pipetting. Second edition, introductory material and pp. 8–11 on pipetting principles.
In an air-displacement pipette, a piston changes the volume of an air cushion between the piston and the liquid. In a positive-displacement pipette, the piston acts directly on the liquid in the disposable assembly. The distinction helps explain why liquid properties and operating technique can affect delivery: the dial setting alone does not establish the delivered volume.[ref]
Gilson Guide to Pipetting. Second edition, pp. 8–11: air-displacement and positive-displacement principles.
For example, repeated nominal water deliveries can be weighed and converted to volume using density and the calibration corrections. Their mean offset from measures a systematic error; variation between deliveries measures repeatability. The two answer different experimental questions: a tightly clustered set of deliveries can still have a biased mean.[ref]
Gilson Guide to Pipetting. Second edition, pp. 46–49: verification procedure, systematic error and random error.
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