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Technical papers, application notes and case studies from laboratory, chemistry, life science and quality control

University of Wroclaw
MSn analysis of nonderivatized and Mtpp-derivatized peptides
Dr. Dorota Gaszczyk, Prof. Zbigniew Szewczuk, Dr. Alicja Kluczyk, University of Wroclaw
The LC-MS-IT-TOF combines QIT (Ion Trap) and TOF (Time-Of-Flight) technologies. The QIT ion trap gives an efficient MSn capability. After selecting the appropriate precursor ions, several MSn experiments could be performed during one introduction of the sample, with product ions obtained serving ...

What Exactly Is a Pollen Allergy?
Kristen Stewart, Zyrtec
Many people welcome spring with its warmer weather, longer days, and blossoming flowers and trees. For the more than 26 million Americans who suffer from allergic rhinitis including pollen allergies, however, this season can be full of misery. What Is Pollen? Pollen is a very fine powdery substa....

Wasser 3.0
New derivatization reaction of perfluorcarboxylic acids with N,N-dimethylformamide dialkylacetals
Dr. Katrin Schuhen, Wasser 3.0
Monika Breithaupt, SAS Hagmann GmbH

N,N-dimethylformamide dialkylacetals are very powerful derivatization reagents. The most known member of this group is N,N-dimethylformamide dimethylacetal or shortly DMF-DMA. We tried to use this compound to derivatize perfluorooctanoic acid (PFOA) and form an ester. However, our research showed...