Did you see the article New Way to Detect Peanut Contamination? For those managing peanut allergies, it's an intriguing read! A study was recently published in the Journal of Near Infrared Spectoscopy regarding a new technology used by researchers in Spain and France. Apparently, there is a form of infrared spectroscopy called "NIR hyperspectral imaging". According to the article, "This analytical technique detects specific molecules based on their absorption and reflection of light at at near infrared wavelengths." Peanut powder generates different spectra than other foods, and by using NIR hyperspectral imaging, scientists are able to detect peanut in individual pixels. Cropsite.com's article explains it far better than I can, but this research sounds very promising!