thumbnail

Stabilized liquid membrane device (SLMD) for the passive, integrative sampling of labile metals in water

Water, Air, and Soil Pollution

By:
, , , and
DOI: 10.1023/A:1012923529742

Links

Abstract

A stabilized liquid membrane device (SLMD) is described for potential use as an in situ, passive, integrative sampler for cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) in natural waters. The SLMD (patent pending) consists of a 2.5-cm-wide by 15-cm-long strip of low-density polyethylene (LDPE) layflat tubing containing 1 mL of an equal mixture (v/v) of oleic acid (cis-9-octadecenoic acid) and EMO-8Q (7-[4-ethyl-1-methyloctyl]-8-quinolinol). The reagent mixture continuously diffuses to the exterior surface of the LDPE membrane, and provides for sequestration of several divalent metals for up to several weeks. Depending on sampler configuration, concentration factors of several thousand can be realized for these metal ions after just a few days. In addition to in situ deployment, the SLMD may be useful for laboratory determination of labile metal species in grab samples. Methods for minimizing the effects of water flow on the sampling rate are currently under investigation.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Stabilized liquid membrane device (SLMD) for the passive, integrative sampling of labile metals in water
Series title:
Water, Air, and Soil Pollution
DOI:
10.1023/A:1012923529742
Volume
133
Issue:
1-4
Year Published:
2002
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Water, Air, and Soil Pollution
First page:
109
Last page:
119