Available online
Description
The programme examines the use of gas chromatography for studying the chemical properties of the homologous series of linear alcohol.
The programme examines the use of gas chromatography for studying the chemical properties of the homologous series of linear alcohol.
| Module code and title: | S101, Science: a foundation course |
|---|---|
| Item code: | S101; 16 |
| First transmission date: | 19-06-1979 |
| Published: | 1979 |
| Rights Statement: | |
| Restrictions on use: | |
| Duration: | 00:24:03 |
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| Producer: | David Jackson |
| Contributors: | Mike Pentz; David Roberts |
| Publisher: | BBC Open University |
| Keyword(s): | Alcohols; Gas chromatography |
| Subject terms: | Chromatographic analysis |
| Footage description: | Brief film shots of a North Sea oil rig and of a sample of crude oil being analysed in the laboratory by gas chromatography. Mike Pentz introduces the programme. Pentz goes on to explain how the gas chromatograph apparatus works. He points to various components of the apparatus while he talks. Shots of a sample made up of a mixture of alcohol being injected into the gas chromatograph machine for analysis. An animation shows in detail the process by which the machine breaks the mixture up into its constituents. Shots of the graph recording produced from the analysis above. Commentary by Pentz. Over film shots of blood samples being tested for alcohol content at the Metropolitan Police Forensic Science Laboratory, David Roberts explains how the technique of gas chromatography is used there to provide evidence on drink / drive offences. Roberts performs an experiment which looks at the chemical properties of the homologous series of linear alcohols. He reacts propanol, butanol, pentanol and hexanol with sodium. He then writes the formulae for these reactions on a pad. Finally, Roberts reacts each of the four alcohols above with phosphorous trichloride. Roberts goes on to react propanol with carboxylic acid, an esterification reaction. He first sets up the apparatus and while doing so, explains what is involved. The reaction is monitored from time to time over a two hour period by gas chromatography and the results are shown on a pen recorded graph. David Roberts analyses the results of the above experiment from the graphs. He then briefly summarises the programme. |
| Master spool number: | HOU2924 |
| Production number: | FOUS016F |
| Videofinder number: | 1191 |
| Available to public: | no |
