Phthalates provide an almost endless opportunity for fascinating annoyance in the lab...Read More
David has over 30 years experience in analytical GC, from gas analysis and trace pesticides to making and testing packed and capillary colums, with former excursions into standard techniques: LC, IR, AA. He’s currently involved with new product development, applying CRS’s strengths in clean inlets and polymers. He has a chemistry degree from Northwestern University and has been with CRS for over 20 years.
Adding a chamfer to septa significantly improves performance by guiding the needle to the same location each time, reducing coring. However, without pre-piercing there is still a high risk of contamination by the SPME needle punching a septum core into the liner, presumably on the first piercing...Read More