Measurement of Volume
This guide explains the best methods for undertaking the measurement of volume, one of the most frequent operations in the laboratory. It is required when obtaining a known quantity of a sample for analysis; for preparation of analytical reagents; and for preparation of calibration standards and quantitative analysis by titrimetry. After an initial section covering the units of volume and other terminology, the various types of volume measuring apparatus are then described. Later sections cover the importance of temperature, calibration, accuracy and use of the different types of apparatus, and the uncertainty of volume measurements. A series of practical exercises are also provided. Measurement of Volume is one of the Practical Laboratory Skills Training Guides, a series that aims to make achieving best practice easy. These invaluable manuals will enable both experienced and inexperienced staff to get the essential basics of any experiment right simply by following the clear and easy to use instructions provided. The guides are written by experienced scientists and include minimal theory, plenty of practical exercises in order to assess competence, and trouble shooting information. Other titles are: Measurement of Mass; Measurement of pH; High Performance Liquid Chromatography; and Gas Chromatography.
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Use of Volumetric Apparatus Graduated Pipettes
accuracy check Allow the liquid ambient temperature analytical laboratory application automatic pipette British Standard calibrated glassware certificate of calibration Class B glassware cubic centimetre cubic decimetre cubic metre details see Section dilute aqueous solutions dispensing equilibrate to ambient error five replicate dilutions formal calibration gas chromatography glass pipettes Graduated cylinders graduated pipette graduated volume graduation mark hydrofluoric acid item of apparatus item of volume item of volumetric liquid delivery liquid to run mass of water measured volume Measurement of Volume measuring cylinder meniscus is tangential methyl orange millilitre mL Bulb pipette mL pipette mL with deionised pipette tip pipettes and burettes polypropylene Practical Laboratory Skills receiving vessel Record all results relevant experimental details residual liquid results and relevant Richard Lawn rinse the pipette Section 8.2 Select a pipette soda-lime glass stop-cock Syringes Table Teddington tolerance value Typical capacities volume measuring apparatus volumetric apparatus volumetric flasks volumetric glassware