Gastight sampler for sequential streamflow sampling

The objective of this work was to design and construct an automatic gastigh t streamwater sampler capable of collecting samples during a 24-hour period . To minimize cost and complexity, wetted glass syringes with narrow collec tion tubes were used as sample containers. The streamwater sampler prototyp e was tested in a stream that contained elevated levels of volatile organic compounds, and it worked satisfactorily under field conditions. Syringe co llectors were a reliable and cost-effective method of acquiring sequential gastight water samples.