2. Instrumentation
This section deals only with spectrophotometers capable of obtaining spectra and measuring absorbances, which excludes simple colorimeters or fixed-wavelength photometers.
2.1 Component organization
Devices can be divided into two categories:
single-beam devices, which are further subdivided into direct-beam and inverted-beam devices;
double-beam devices, with direct optical mounting.
The choice of equipment will depend on the problems to be solved: double-beam equipment is arguably the most powerful in terms of analysis capabilities and metrological characteristics, and is generally the most expensive! On the other hand, many single-beam devices...
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Instrumentation
Instrument parameters
Bibliography
▪ Publications cited in the text
Standards
Association française de normalisation AFNOR :
• Guide to the expression of measurement uncertainties. NF ENV 13005 (1999).
• Molecular absorption spectrophotometry – Vocabulary and generalities. T01-030 (December 1982).
• Analytical chemistry – Volume 1: analysis, fundamental standards – Volume 2: sampling, general methods of analysis and reagents, ISBN: 2-12-172911...
Regulations
In the field of UV-VIS molecular absorption spectrophotometry, there are many organizations publishing regulations or recommendations:
or in specific fields: US and EU Pharmacopeia for pharmaceuticals;
or in general fields: ASTM, LNE, Eurachem... for analysis methods and data processing, IUPAC for vocabulary ;
...
Manufacturers – Suppliers – Distributors
(Non-exhaustive list)
Contact details for manufacturers of UV-VIS spectrophotometers can be found on specialist websites such as Globalspec http://www.globalspec.com , or via search engines. This information is given in the section on websites below (note that European manufacturers...
Websites
While the Internet is an extraordinary source of information, finding the right information is not always easy, particularly in the scientific and technical fields. The search for information is generally carried out using search engines, or meta-search engines that combine results obtained from several engines.
Two difficulties appear for this research:
...
Organizations
Contact details for learned societies and organizations involved in spectrophotometry are given in the "Websites" section above. These organizations often publish free or pay-per-view journals, and have documentation resources accessible via their websites.
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