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 This distributor is no longer active