Researchers have developed a prototype sampling system that uses coated magnetic beads to capture and hold pathogens/bacteria in fluid samples. The prototype allows continuous cleaning of water, as well as re-suspension of bacteria-nanoparticle aggregates. When the prototype was tested with contaminated deionized water, above 80% of the bacteria was captured and re-suspended in approximately a tenth of the original volume in 5 minutes. This capture efficiency matches the typical capture efficiency of the nanoparticles used in the experiment. Approximately 80% to 90% of the bacteria cells were recovered from the experiments performed. The capture efficiency of the nanoparticles appeared to be approximately 70%. Researchers believe the system shows promise as a viable and simple method for capturing bacteria in food safety applications.
Project Contact: Jie Xu