Chemistry Compilation Tape
- Alternative title
- Laboratory Techniques in Chemistry
- Synopsis
- A compilation of the five programs in the LABORATORY TECHNIQUES IN CHEMISTRY series.
- Language
- English
- Country
- Great Britain
- Medium
- Video; Videocassette. Standard formats. col. 58 min.
- Year of production
- 1982
- Availability
- Sale; 1997 sale: £25.00 (+VAT +p&p)
- Subjects
- Chemistry
- Keywords
- chemistry experiments; chromatography; laboratory procedures; melting point; solvent extraction; spectrometry; vacuum technology
Credits
- Director
- Gavin Nettleton
- Writer
- Grace Coombe
- Cast
Grace Coombe
Sections
- Title
- Thin layer chromatography 1
- Synopsis
- 1 (1982, 10 min): A short history of chromatography, followed by a detailed demonstration of the thin-layer chromatographic technique using silica gel coated plates. Discusses precautions that have been taken and explains the use of spray locating reagent
- Title
- Vacuum filtration
- Synopsis
- 2 (1982, 20 min): Examines the assembly of Buchner funnel, flask and filter paper and demonstrates the vacuum filtration of slurry, which is pre-cooled to minimse solubility, and then the washing of residue and transfer to the drying oven at a temperature
- Title
- Perkin-Elmer 137 spectrometer, The
- Synopsis
- 3 (1982, 14 min): Explains the operation of the Perkin-Elmer 137 spectrometer, including precalibration with polystyrene film and care. Also shows associated NaC1 discs and cells. Shows the measurement of liquid samples as thin layer between NaC1 discs or
- Title
- Liquid-liquid extraction
- Synopsis
- 4 (1982, 9 min): Demonstrates the extraction of an organic compound (caffeine) from water (tea) into an organic solvent (chloroform). Explains the criteria for the choice of solvent, the types of funnels to be used and the use of drying agents.
- Title
- Determination of melting points, The
- Synopsis
- 5 (1981, 5 min): Explains the use of the Koffler [Khofler?] hot bench to determine the purity and melting point of a range of different chemicals. Demonstrates use of melting point tables for identification and purity estimation and shows the operation wi
Distributor
- Name
University of Brighton Media Services
- Notes
- NB. This distributor is no longer active
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