31 Determination of Phthalates in Drinking Water
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Thermo Fisher Scientific has developed an efficient high-performance liquid chromatography (HPLC) method using ultraviolet detection for the simultaneous determination in drinking water of all 19 phthalate compounds listed in key environmental regulatory documents. Application Note 1045: Determination of Phthalates in Drinking Water by UHPLC with UV Detection demonstrates that the phthalates listed in European Union Directive 2005/84/EC, U.S. Environmental Protection Agency Methods 606 and 8061A, the Chinese HJ/T 72-2001, and the Standardization Administration of China GB/T 20388-2006 and GB/T 21911- 2008 are well separated on a reversed-phase HPLC column in less than 25 minutes.
Phthalates are a class of chemical compounds widely used as plasticizers for polyvinyl chloride resins, adhesives, and cellulose film coating. Phthalates are potentially hazardous to human health—especially to children’s health—due to their classification as endocrine disruptors. This has resulted in regulations regarding the types and levels of phthalates allowable in plastic toys, water containers, textiles, and foods.
This application note and many others can be found at
www.thermoscientific.com/dionex under the Documents tab
Total Nitrosamines Analysis System
In certain production processes such as those in cosmetics or agricultural pesticides industries, it is important to analyse for the presence of Nitrosamines, but it is not all ways essential to know the exact profile of the nitrosamine species.
The Ellutia Chemical Stripping System has been developed to be used in unison with an 800 Series TEA to perform total nitrosamine analysis. Instead of using a pyrolyser to heat the nitrosamine to remove the NO group, a chemical reaction can be employed. The alleviation of NO from the nitrosamine is performed by a reflux reaction with hydrobromic acid in ethyl acetate. The nitrosamine sample is injected into the reaction vessel and produces NO, a secondary amine and bromine. The NO is then carried in a gas stream through a cold trap (removing any vapour) to the TEA
For further information please visit
http://www.ellutia.com/Total
Nitrosamines.html
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