Hi,
Baseline Dip using PA800 Plus SDS-MW Application
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.
N-Methyl Pyrollidone
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??
What have we learned from the nitrosamine crisis?
The pharmaceutical industry is facing an ongoing issue with genotoxic impurities (GTIs). Over the past year, we have witnessed genotoxic impurities affect several drugs, including those used to treat elevated blood pressure, heartburn and acid reflux. Angiotensin II...
Adapting a SCIEX high flow source for microflow LC
To set up a SCIEX high flow source for microflow LC (Turbo V ion source, DuoSpray source or IonDrive Turbo V ion source), first you must replace the wider bore electrodes with more narrow bore hybrid electrodes. Note with the OptiFlow Turbo V ion sources, there are...
Developing a method for nitrosamine analysis in pharmaceutical products
In our previous blogs we discussed the need for a more comprehensive approach for monitoring contaminants in finished drug products.1,2 Here we cover a generalized approach for the targeted, quantitative LC-MS/MS analysis of several commonly encountered nitrosamines in pharmaceuticals and ways to address specific challenges with their analysis.
Are we proactively solving the nitrosamine crisis?
In my previous blog, I spoke about the FDA recall of angiotensin II receptor blockers like losartan. This recall was due to the presence of genotoxic nitrosamines. Is a proactive approach the way to mitigate risk? Recently, the FDA has re-issued the 2018 guidance to...