Effects of Sampling Equipmenton the Chemical Integrity of Groundwater Samplesby Mohamed F. Dahab, Univ of Nebraska-Lincoln, Lincoln, NE, USA,
William E. Kelly, Univ of Nebraska-Lincoln, Lincoln, NE, USA,
Abstract: Proper sampling of groundwater is one of the basic steps in monitoring movement of pollutants in groundwater systems. The effect of the use of silicone rubber when used as a bladder in groundwater samplers on the testing efficiency was investigated. Common volatile organic chemicals used for monitoring were halogenated methanes. It was concluded that there was no statistically significant difference between samples collected using a pump with a silicone rubber bladder and one with a Teflon bladder when halogenated methanes were used as the test chemicals. Also there was no conclusive evidence that silicone rubber was acting as a sorbent or desorbent for the halogenated methanes used as the test chemicals. Further testing is required to verify this conclusion.
Subject Headings: Groundwater pollution | Silica | Groundwater | Methane | Water resources | Organic chemicals
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