The Application Notebook
Column lifetime is a more and more important issue when developing an analytical method for HPLC. Besides sample treatment, column cleaning and storage, operational parameters of the analytical method will have an influence on column lifetime. This question may not always be addressed early enough in the methods development process.
The Application Notebook
Polybrominated diphenyl ethers (PBDEs) are among the most important and widely used flame retardants. Recent legislation banned certain PBDE congeners.? EU directive 2003/11/EC prohibits the use of Penta-BDE and Octa-BDE for the member states of the European community.? Therefore, analysis of PBDEs have received increased interest as a result of their known toxicity.
The Application Notebook
On 13 February 2003 the European Union published the new regulation on electric and electronic waste, (WEEE, Waste Electrical and Electronic Equipment) as well as the restriction of the use of certain hazardous substances in electric and electronic equipment (RoHS). Thus both regulations became effective, and in January 2005 they were transferred into national law. According to RoHS, lead, mercury, cadmium, chromium (VI), polybrominated biphenyls (PBB) and polybrominated diphenylethers (PBDE) are forbidden from July 2006. Shimadzu, one of the leading manufacturers of analytical instrumentation offers the complete hardware and software for the secure identification of hazardous substances as well the know-how and competence.
The Application Notebook
GC column bleed has been postulated to be caused by "backbiting" of the siloxane chain and volatility of noncrosslinked oligimers...
The Application Notebook
Allsep Technologies, Inc. For more information, visit the company's website at www.allsep.com.
The Application Notebook
Phytosterols and stanols (hydrogenated phytosterols) are naturally occurring substances?
The Application Notebook
An application note from Polymer Laboratories...
