3. Instrument parameters
This section describes the instrumental parameters involved in the performance characteristics of spectrophotometers. In particular, these parameters determine spectral range, spectral resolution, stray light levels and measurement dynamics, i.e. the concentration range that can be covered without having to dilute concentrated samples, or concentrate diluted samples.
3.1 Spectral range
UV-VIS spectrophotometers cover the range from 190 to 800 nm, with some devices limited to 220 nm. Some spectrophotometers can also work in the near-infrared range, up to 2,500 nm, bridging the gap with mid-infrared devices that cover the 2,500 nm-40,000 nm range.
We saw in the previous paragraph that the lower...
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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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