Monthly Archives: September 2010

ISFET Technology and pH Accuracy

ISFET (Ion-Sensitive Field-Effect Transistor) pH electrodes have been available for quite some time. Nelson-Jameson customers engaged in Food Processing need to be aware that a bias associated with ISFET and food samples is commonly observed. In many cases, they do not generate the same results as traditional electrodes that incorporate glass for pH sensing.

At Nelson-Jameson, we have found that ISFET electrodes appear to compare quite well with traditional electrodes when used in virtually clear liquids; the bias becomes much greater in opaque and other solutions with greater amounts of solids. Customers that insist on ISFET style electrodes should take into consideration the potential for bias in their pH analysis for food processing applications.

Several manufacturers offer ISFET electrodes that may perform well in specific applications, and these are available through Nelson-Jameson.

Nelson-Jameson presents Elmer Marth Educator Award at IAFP 2010

To recognize an International Association for Food Protection member for dedicated and exceptional contributions to the profession of educator, Nelson-Jameson, Inc. and IAFP presented this year’s Elmer Marth Educator Award to David A. Golden of Knoxville, Tennessee.

Dr. Golden was noted for his professional competence, magnitude of service, and exceptional efforts as a student mentor. Currently, Dr. Golden is a Professor of Food Microbiology with the Department of Food Science and Technology and Faculty Fellow with the Haslam Scholars Program at the University of Tennessee. He has received several awards for excellence in teaching and student advising and is actively involved in student recruitment and promotion of student development.

Fritz Buss, Technical Director, Nelson-Jameson, Inc., along with previous award winner, LeeAnn Jaykus from North Carolina State University, presented the award to Dr. Golden at a ceremony during the IAFP Annual Conference in Anaheim, California on August 4th.

Pictured: (from left) LeeAnn Jaykus, Dr. David A. Golden and Fritz Buss