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Allergy policies for nut-free commercial flights and nut-free childcare settings are not a rare occurrence nowadays—the reason is a rise in food allergies. Nuts are the most potent allergenic foods in terms of the amount that is required to elicit an allergic reaction and the severity of those reactions.
LC-MS/MS is a powerful analytical tool in forensic toxicology testing that can support a variety of testing regimes such as screening, confirmation and quantitative workflows. More specifically, analysis of NPS using LC-MS/MS provides many advantages, including the ability to reliably detect new drugs and their metabolites from a variety of biological matrices.
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.
How do I set up my processing method to calculate the RRT of the main peak to 10kD in karat 32 software?
Hi,
On June 12, 2023, during a webinar hosted by New Food, Lin Qingsong—Principal Research Fellow and Director of the Protein and Proteomics Centre at the National University of Singapore—discussed the latest considerations related to risk assessment of alternative proteins.
We’ve noticed that with some gel buffer lots, we see a dip in the baseline at 280 nm when analyzing proteins per the SDS-MW protocol. Has anyone experienced this before? We don’t always see it and are wondering what causes the dip.
I am in the process of analyzing nitrosamines using QTRAP. One of the difficulties in my sample preparation would be using NMP as solvent to dissolve the material. Is it safe to inject approximately 10ul of NMP is QTRAP??
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.
our 7600 couple with nanoLC Ultimate 3000 via contact closure. it has run without any loss connection during the batch. Just yesterday, the last injection keep equilibrating system until the LC finished the gradient run. We closed the software and power off LC and MS then started again but it did not help. The Dionex engineer also checked their LC and triggerring cable found both are ok.
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