An oil slick sampling apparatus and method wherein a substantially annular hoop-like frame adapted to float on water and surround the slick, has an inner annular surface coacted with a surface active material which functions by spreading to compress the area of the oil slick. According to one embodiment...http://www.google.es/patents/US3988932?utm_source=gb-gplus-sharePatente US3988932 - Oil slick sampling apparatus and method
