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A laboratory and field evaluation of a portable immunoassay test for triazine herbicides in environmental water samples

International Journal of Environmental Analytical Chemistry

By:
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https://doi.org/10.1080/03067319308044435

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Abstract

The usefulness and sensitivity, of a portable immunoassay test for the semiquantitative field screening of water samples was evaluated by means of laboratory and field studies. Laboratory results indicated that the tests were useful for the determination of atrazine concentrations of 0.1 to 1.5 μg/L. At a concentration of 1 μg/L, the relative standard deviation in the difference between the regression line and the actual result was about 40 percent. The immunoassay was less sensitive and produced similar errors for other triazine herbicides. After standardization, the test results were relatively insensitive to ionic content and variations in pH (range, 4 to 10), mildly sensitive to temperature changes, and quite sensitive to the timing of the final incubation step, variances in timing can be a significant source of error. Almost all of the immunoassays predicted a higher atrazine concentration in water samples when compared to results of gas chromatography. If these tests are used as a semiquantitative screening tool, this tendency for overprediction does not diminish the tests' usefulness. Generally, the tests seem to be a valuable method for screening water samples for triazine herbicides.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A laboratory and field evaluation of a portable immunoassay test for triazine herbicides in environmental water samples
Series title:
International Journal of Environmental Analytical Chemistry
DOI:
10.1080/03067319308044435
Volume:
53
Issue:
4
Year Published:
1993
Language:
English
Publisher:
International Association of Environmental Analytical Chemistry
Publisher location:
London
Contributing office(s):
Minnesota Water Science Center
First page:
307
Last page:
319
Online Only (Y/N):
N
Additional Online Files (Y/N):
N