COVID-19 Notice: In support of local and federal COVID-19 guidelines, we are unable to process shipments after 12PM EST on Thursday, March 26th. We encourage you to consider the electronic variant offered for many of our products (i.e. Z136 Standards, Hazard Evaluation Software). We will continue to offer customer support by phone or email during our regular operating hours. Thank you for your understanding.

help desk software

Product Code: JLA_19_4_207

Vanessa A. Varaljay-Spence
Department of Biological, Geological and Environmental Sciences, Cleveland State University, Cleveland, Ohio 44115, NASA Glenn Research Center at Lewis Field, Brook Park, Ohio 44135, and Department of Microbiology, University of Georgia, Athens, Georgia 30602

Maximilian C. Scardelletti
NASA Glenn Research Center at Lewis Field, Brook Park, Ohio 44135

This article discusses the development of a bench-top technique to detect antigens in fluids. The technique involves the use of near infrared (NIR) fluorescent dyes conjugated to antibodies, centrifugation, nanofilters, and spectrometry. The system used to detect the antigens utilizes a spectrometer, fiber optic cables, NIR laser, and laptop computer thus making it portable and ideally suited for desk top analysis. Using IgM as an antigen and the secondary antibody, anti-IgM conjugated to the near infrared dye, IRDye™ 800, for detection, we show that nanofiltration can efficiently and specifically separate antibody-antigen complexes in solution and that the complexes can be detected by a spectrometer and software using NIR laser excitation at 778 nm and NIR dye offset emission at 804 nm. The peak power detected at 778 nm for the excitation emission and at 804 nm for the offset emission is 879 pW (−60.06 dBm) and 35.7 pW (−74.5 dBm), respectively.

Product Thumbnail


Members: $25.00

Note: When applicable, multiple quantity discounts are applied once the items are added to your cart.