5. Conducting an analysis
When it comes to routine analyses, procedures are generally 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 "online" analysis, errors depend mainly 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 for sequential devices, and that it has not brought about any significant improvements in obtaining spectra – except for the analysis time – for devices with inverted optical mounting. Improvements in the quality of results have been achieved mainly through the use of computational methods and compliance with written procedures. These...
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Conducting an analysis
Areas of application
Bibliography
▪ Publications cited in the text
Standards
French Standardization Association AFNOR:
• Guide to the expression of measurement uncertainties. NF ENV 13005 (1999).
• Molecular Absorption Spectrophotometry – Vocabulary and General Information. 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 that publish regulations or recommendations:
either in specific fields: US and EU Pharmacopeia for pharmacy;
either in general fields: ASTM, LNE, Eurachem, etc. for analysis methods and data processing, IUPAC for vocabulary;
...
Manufacturers – Suppliers – Distributors
(Non-exhaustive list)
The contact details of UV-VIS spectrophotometer manufacturers can be found on specialized websites such as Globalspec http://www.globalspec.com or through search engines. This information is listed in the section below (please note that European manufacturers...
Websites
While the Internet is an extraordinary source of information, finding the right information is not always easy, particularly in scientific and technical fields. Information is generally searched for using search engines or meta search engines that aggregate results from several engines.
Two difficulties arise in this research:
the choice of keywords to launch...
Organizations
The contact details for learned societies and organizations involved in spectrophotometry are provided in the "Websites" section above. These organizations often publish free or paid journals and have a document library that can be accessed from their website.
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