About Dr. Rachel Kohn

CDC Refrigeration Guidelines for Submitting COVID-19 Specimens for Testing

By Rachel Kohn | March 31, 2020

While the search for a Coronavirus vaccine proceeds at full throttle a crucial issue is proper collection, labeling, storage and shipping of COVID-19 specimens to CDC laboratories for testing. Among procedures spelled out in the CDC’s Interim Guidelines is that coronavirus specimen shipments must be stored at 2-8⁰C and shipped overnight on icepack for testing…

How a HPLC Digital Flow Meter Works

By Rachel Kohn | February 19, 2020

To support IQ, OQ and PQ HPLC systems should be regularly checked for consistency and accuracy by using a digital HPLC flowmeter.

How to Specify a Compact Medical Refrigerator

By Rachel Kohn | January 8, 2020

Vaccines and other pharmaceuticals should be stored in medical refrigerators designed to maintain strict temperature control and alert personnel to temperature changes.

How to Degas Liquids with Ultrasonic Energy

By Rachel Kohn | November 11, 2019

Smoke damaged equipment can be restored using pressure spray cabinets and specialized ultrasonic cleaners.

How to Select an Under Counter Lab Freezer

By Rachel Kohn | October 1, 2019

Options to consider when purchasing undercounter lab refrigerators and freezers.

How to Check Pump System Accuracy for HPLC Analysis

By Rachel Kohn | July 17, 2019

Pump system accuracy is crucial for equipment used to conduct high performance liquid chromatography (HPLC) analysis in the pharmaceutical and other industries subject to regulatory oversight by the FDA and similar authorities. Among functions performed by HPLC are included checks for purity, monitoring changes in pharmaceutical intermediates during chemical synthesis scale-up, stability and dissolution tests,…