5. Conducting an analysis
For routine analyses, procedures are usually written down in a document. Software can be configured for these analyses. Procedures must include sample preparation and storage, where errors can be much greater than the uncertainties associated with the measurement itself! In "on-line" analysis, errors depend above all on the location of the measurement point and the nature of the sample: bubbles, particles, dirt, etc.
In the field of molecular absorption spectrophotometry, it can be said that technology has evolved little in the case of sequential instruments, and that it has not brought any significant improvements in obtaining – spectra, except in terms of analysis time – for inverted optical assembly instruments. The quality of the results has been improved more through the use of calculation tools and compliance with written procedures. These calculation tools,...
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Conducting an analysis
Fields of application
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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