Passive water sampler and method of sampling

Details Passive water sampler and method of sampling Passive water sampler and method of sampling

1998-10-06

1999-12-07

Raevis, Robert

Measuring and testing

Sampler, sample handling, etc.

With constituent separation

G01N 122

Patent

active

059964235

ABSTRACT:
An improved method and apparatus for monitoring the concentration of contaminants, including volatile organic compounds, in groundwater is provided comprising a semipermeable membrane defining an inner chamber. The chamber is carried within a mesh protective sleeve of cover to prevent abrasion or puncture of the chamber. The membrane is permeable to contaminants but impermeable to a reference fluid, which is distilled water. The method of sampling comprises placing the semipermeable membrane chamber, which contains the reference fluid, in contact with contaminated groundwater, thereby allowing contaminants to diffuse through the semipermeable membrane.

REFERENCES:
patent: 4078433 (1978-03-01), McCabe, Jr. et al.
patent: 5147561 (1992-09-01), Burge et al.
patent: 5235863 (1993-08-01), Bailey et al.
patent: 5454275 (1995-10-01), Kabis
patent: 5804743 (1998-09-01), Vroblesky et al.

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