Varian, Inc. has published an application note entitled Enhanced ELSD Sensitivity of Parabens using Sub-Ambient Evaporation. This note shows that the Varian ELSD surpasses other ELSDs for low temperature HPLC applications with semi-volatile compounds.
Understanding FDA Recommendations for N-Nitrosamine Impurity Levels
April 17th 2025We spoke with Josh Hoerner, general manager of Purisys, which specializes in a small volume custom synthesis and specialized controlled substance manufacturing, to gain his perspective on FDA’s recommendations for acceptable intake limits for N-nitrosamine impurities.