Patent ID: 6481300
Filing Date: 2002-11-19
Classification: G01N

Abstract:
A method of collecting a fluid sample using a sampling device having a tube which comprises a pliant material and having a sealed first end, a check valve connected at a second end of the tube, and a bouyancy-compensating ballast compartment, the tube defining an interior cavity, the method comprising:lowering the sampling device into the fluid to be sampled while maintaining the check valve in the closed position; moving the sampling device up and down to pump fluid into the tube, wherein the check valve is opened each time the sampling device is pulled upwards allowing fluid to enter the interior cavity; filling up the interior cavity of the tube with fluid such that check valve closes and remains substantially closed against further movement when the cavity is substantially filled while submerged, thereby preventing additional fluid from entering the interior cavity; and pulling the sampling device out of the fluid.