In a previous blog outlining the advantages of high-resolution accurate mass measurements for protein quantitation using the TripleTOF 6600, it was noted that although the triple-stage quadrupole demonstrated high sensitivity when operated in multiple reaction monitoring mode (MRM), the relatively low-resolution measurement of m/z failed to discriminate Rituximab response from nominally isobaric interferences given the complexity of the proteolytically digested samples (June 28/2016). While the accurate mass filtering capabilities of the TripleTOF 6600 represents one mechanism for achieving increased selectivity over MRM, the triple quadrupole/linear ion trap (LIT) hybrid platform represented by the QTRAP® 4500, 5500, 6500 and 6500+ systems provides an alternative technique by leveraging a third stage of MS, often referred to as MRM3. In this blog, we outline the MRM3 scan function and survey several large molecule applications which utilize the additional stage of fragmentation in the LIT to yield significant improvements in achievable detection limits when compared to MRM.
Tags
Nitrosamines: Where are we now?
Nitrosamines are a large group of N-nitroso compounds that share a common functional N-N=O group. They are produced by a chemical reaction between a nitrosating agent and a secondary or tertiary amine. Back in 2018, nitrosamines suddenly found themselves in the spotlight when they were unexpectedly detected in medications for high blood pressure. Since then, they have been found in several other prescription medications, including those for heartburn, acid reflux and diabetes, resulting in manufacturers recalling some common medications.
Easy switching of sources and LC flow regimes on the ZenoTOF 7600 system
This series of videos outlines how a user can easily switch sources and operate the system in different LC flow regimes.
Thailand cannabis legalization
Thailand has become the first southeast Asian country to legalize cannabis for medical use. Cannabis was originally introduced into Thailand from India, and until it was outlawed in the 1930s, it was historically used as a kitchen condiment, medicine and source of fiber.
Uploading and using transcriptomics data in the OneOmics suite
RNA experiments can be created in the OneOmics suite for multi-omics analyses, enabling integration of transcriptomics data and proteomics data for biological insight. To build RNA experiments, either CloudConnect for PeakView software 2.2 or BaseSpace (Illumina) can...
Downloading results from SCIEX Data Store or BaseSpace
Once your data processing sessions have completed, the results files are saved back to either SCIEX Data Store or BaseSpace. These can be downloaded from the cloud to your desktop for additional analysis. Please see these community posts to learn more: Explaining the...
Breaking down the SCIEX Triple Quad™ 7500 LC-MS/MS System – QTRAP® Ready
Sensitivity and robustness carry different meanings in the world of mass spectrometry. Generally, sensitivity refers to an instrument’s ability to achieve lower limits of detection (LOD). Robustness, on the other hand, refers to an instrument’s ability to consistently...
The honey sting
As a consumer it’s hard for me not to feel inundated with claims that our food is “all-natural” or “chemical-free” or that we should buy certain “superfoods” for their health benefits. We read labels and trust that the product we are buying is what we are truly...
The top 5 questions to ask when investing in accurate mass technology for forensic toxicology workflows
Are you considering the purchase of a high-resolution accurate mass (HRAM) instrument for your forensic toxicology lab? To help ensure you invest in a solution that ideally meets your needs, ask yourself the following key questions. 1. How do I ensure my results...
Innovation that’s blasting through limitations in explosive detection
Mass spectrometry’s important role in identifying explosives The need for rapid explosive detection is now an unfortunate reality. The remit is multifaceted. The first is for preventative purposes, to protect us from any threat to life. The second is in the...
A new generation of therapeutic modalities
There are over 7,000 genetic diseases that could potentially be cured using gene therapy. Rare metabolic diseases, autoimmune disorders, cardiovascular disease and cancers are some of the top disease classes that can be addressed with gene therapies. With over 1,000...
No Results Found
The page you requested could not be found. Try refining your search, or use the navigation above to locate the post.
No Results Found
The page you requested could not be found. Try refining your search, or use the navigation above to locate the post.