Abstract
Conventional membrane filtration to separate particulate material from water samples, such as in the analysis of dissolved nitrogen and phosphorus, is time consuming and subject to contamination. To minimize this problem, a device is presented that allows filtration of up to 80 samples per hour without introducing contamination or affecting the sample integrity. The device requires only partial dismantling and minimal cleaning with dilute hydrochloric acid between samples. Validation tests show that the device does not alter dissolved constituents in filtered samples. Unlike conventional membrane filtering apparatus, a cumbersome vacuum flask is not required. The system is compact and easily adapted to mobile and shipboard laboratories.
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