The Gold Particle Test (GPT) is the most precise user-conducted integrity test on the market for Planova™ virus-removal filters. It serves to re-confirm filter pore size distribution after virus filtration. Now you can automate the GPT for 1.0 m² and 4.0 m² of Planova™ 15N and 20N filters using the compact Asahi Gold Particle Test System-II (AGPTS-II).
In the test, a colloidal gold particle solution is applied to the filter. Prior to the beginning of the test, an in-line visual wavelength spectrometer measures the initial absorbance. As the gold particle solution passes through the Planova™ filter, a second absorbance reading evaluates the gold particle removal rate and a pass or fail result is determined based on an LRV calculation of the absorbance values.