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QTRAP / Triple Quad

QTRAP / Triple Quad systems

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A 2-fold revolution: MS approaches for the bioanalysis of oligonucleotide therapeutics

A 2-fold revolution: MS approaches for the bioanalysis of oligonucleotide therapeutics

by | Apr 29, 2024 | , , , , ,

In 1998, the US Food and Drug Administration (FDA) approved fomivirsen as the first therapeutic oligonucleotide therapeutic. This approval marked a revolution of mechanism of action discovered decades before finally coming to fruition. Since then, the landscape of chemical modifications of oligonucleotides, conjugations and formulations has evolved tremendously, contributing to improvements in stability, efficacy and safety. Today, more than a dozen antisense oligonucleotides (ASOs) and small interfering RNA (siRNA) drugs are on the market, most of which are designated as orphan drugs for treating rare genetic diseases.

Unlock the benefits of nominal mass spectrometry for NPS analysis

Unlock the benefits of nominal mass spectrometry for NPS analysis

by | Mar 11, 2024 | , , , ,

The development of analytical methods for the detection and quantitation of drugs and metabolites in a range of biological matrices is a challenging process. Forensic toxicology labs need a reproducible and reliable methodology to ensure the robustness of the data and the quality of the results. They also need robust and sensitive instrumentation that can detect drugs at trace levels with high specificity, especially when it comes to novel psychoactive substances (NPS), which can be difficult to monitor and control.

Overcoming N-nitrosamine analysis challenges with mass spectrometry and chromatography solutions

Overcoming N-nitrosamine analysis challenges with mass spectrometry and chromatography solutions

by | Sep 6, 2023 | , , ,

N-nitrosamine analysis has raised significant concerns in the pharmaceutical industry since 2018, when these potential carcinogens were found in several angiotensin II receptor blockers (sartans). Subsequent discoveries in ranitidine and some slow-release metformin medications prompted widespread product recalls. The industry has implemented stricter manufacturing requirements and intensified efforts to evaluate and control N-nitrosamine contamination. To meet stringent regulatory requirements, it is essential to develop effective chromatography and mass spectrometry (MS) methods for N-nitrosamine analysis. This blog addresses the challenges associated with detecting N-nitrosodimethylamine (NDMA) in metformin drug products.

calibration using sum of peak areas vs concentration

Standard peaks are noisy

by | May 17, 2023 | , , ,

I am Using Sciex Qtrap 4500 for quantification of nitrosamines (NDMA&NDBA). I am facing issue with higher baseline intensity. When developed the method in APCI the basline was at about 5e4. but now even after cleaning the source (i.e. Changed capillary to new, Curtain plate & Corona needle cleaning, given blank injection overnight ), my base line decreased from 1e6 to 4 e5, but settled at 4 e5 from past 24 hours. can you suggest me how decrease my baseline intensity further to below 1e5. My standard peaks are like noise now.

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The SCIEX clinical diagnostic portfolio is For In Vitro Diagnostic Use. Rx Only. Product(s) not available in all countries. For information on availability, please contact your local sales representative or refer to www.sciex.com/diagnostics. All other products are For Research Use Only. Not for use in Diagnostic Procedures. Trademarks and/or registered trademarks mentioned herein, including associated logos, are the property of AB Sciex Pte. Ltd. or their respective owners in the United States and/or certain other countries (see www.sciex.com/trademarks).

Echo and Echo MS are trademarks or registered trademarks of Labcyte, Inc. in the United States and other countries, and are being used under license.
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