Thermo Fisher Scientific

Articles by Thermo Fisher Scientific

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The Central Dogma of Molecular Biology states the genetic information stored in our DNA is transcribed into an intermediate molecule, RNA, which is then translated into protein. There are three main types of RNA associated with transcription/translation: messenger RNA, ribosomal RNA, and transfer RNA. All RNAs in the biological system carry post transcriptional modifications: chemical functional groups added to the base, the ribose sugar, or both. The gold standard in analytical technology for identification and characterization of these modifications remains steadfast in the realm of liquid chromatography hyphenated to high resolution accurate mass spectrometry. This paper covers how the analysis of native RNA is technically demanding and how RP-based separation strategies that avoid ion-pairing reagents are in demand. It highlights the use of Orbitrap Tribid MS for system evaluation with and without sulfolane to assess retention, signal stability, and fragmentation efficiency.

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The first charged aerosol detector (CAD) was introduced in 2005. Nearly twenty years later, this near-universal detector has become an indispensable tool in the analytical chemist’s quantitative arsenal. This paper explores the CAD’s origin story, its adoption into everyday use by separation scientists, and its comparison to evaporative light scattering detector (ELSD). Technical highlights will include how parameters such as evaporation temperature influence application versatility, and how the power function impacts linearity and response behavior.

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In this study, the suitability of the TSQ 9610 triple quadrupole GC-MS/MS system was assessed for the analysis of more than 200 pesticides in black tea at trace concentrations supplemented with SPE cleanup. The linearity, accuracy, precision, limit of quantitation, and injection reproducibility of 20 selected analytes representative of the different pesticide classes in black tea matrix are demonstrated.

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High-quality data is critical in the pharmaceutical industry. Chromatography Data Systems (CDS) are helping organizations ensure data integrity, compliance with regulatory requirements, and the production of safer medicines.