Rapid method for determining concentrations of Bayer 73 in water during lampricide treatments
Journal of the Fisheries Research Board of Canada
None
By: V. K. Dawson, P.D. Harman, D.P. Schultz, and J. L. Allen
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Abstract
Two simple, rapid, sensitive methods were developed for determining the concentration of the lampricide 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73) in stream water. Bayer 73 was extracted from acidified water samples with chloroform and then hydrolyzed to 2-chloro-4-nitroaniline (CNA) with either acid or base. The CNA was diazotized with sodium nitrite, and an azo dye was formed with either N-( 1-naphthyl) ethylenediamine dihydrochloride (after acid hydrolysis) or 1-naphthol (after base hydrolysis). There was no interference from the lampricide 3-trifluoromethyl-4-nitrophenol (TFM) in either method. Standard curves were prepared with untreated water to compensate for interfering substances that occurred naturally in some streams. The methods were sensitive to about 0.005 mg/L (ppm). Time required for analysis of a sample ranged from 25 min to 1 h.
Suggested Citation
Dawson, V.K., Harman, P., Schultz, D., Allen, J.L., 1978, Rapid method for determining concentrations of Bayer 73 in water during lampricide treatments: Journal of the Fisheries Research Board of Canada, v. 35, no. 9, p. 1262-1265, https://doi.org/10.1139/f78-196.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Rapid method for determining concentrations of Bayer 73 in water during lampricide treatments |
| Series title | Journal of the Fisheries Research Board of Canada |
| DOI | 10.1139/f78-196 |
| Volume | 35 |
| Issue | 9 |
| Year Published | 1978 |
| Language | English |
| Publisher | NRC Research Press |
| Publisher location | Ottawa, Ontario |
| Contributing office(s) | Upper Midwest Environmental Sciences Center |
| Description | 4 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of the Fisheries Research Board of Canada |
| First page | 1262 |
| Last page | 1265 |