Apparatus for inhibiting contamination of sample during bailer emptying

摘要

A bailer collects a column of liquid fluid of predetermined height from a body of liquid fluid at a predetermined depth. The bailer is emptied without contaminating the collected liquid fluid with oxygen. The bailer has two check valves spaced apart from one another by a preselected distance so that it can collect liquid fluid at a predetermined depth below the surface of the body of liquid fluid. A vent opening is formed between the first check valve and the second check valve to enable the bailer to be emptied in the substantial absence of oxygen contamination.