Gas-liquid chromatographic determination of Bayer 73 in fish, aquatic invertebrates, mud, and water
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Abstract
A gas-liquid chromatographic (GLC) method is described for determining residues of Bayer 73 (2-aminoethanol salt of 2’,5-dichloro-4’-nitrosalicylanilide) in fish muscle, aquatic invertebrates, mud, and water by analyzing for 2-chloro-4-nitroaniline (CNA), a hydrolysis product of Bayer 73. Bayer 73 residues are extracted from fish muscle tissue, invertebrates, and mud with acetone-formic acid (98+2), and partitioned from water samples with chloroform. After sample cleanup by solvent and acid-base partitioning, the concentrated extract is hydrolyzed with 2N NaOH and H2O2 for 10 min at 95°C. The CNA is then partitioned into hexane-ethyl ether (7+3) and determined by electron capture GLC. Average recoveries were 88% for fish, 82% for invertebrates, 82% for mud, and 98% for water at 3 or more fortification levels.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Gas-liquid chromatographic determination of Bayer 73 in fish, aquatic invertebrates, mud, and water |
| Series title | Journal of the Association of Official Analytical Chemists |
| DOI | 10.1093/jaoac/62.5.1141 |
| Volume | 62 |
| Issue | 5 |
| Publication Date | January 22, 2020 |
| Year Published | 1979 |
| Language | English |
| Publisher | Oxford Academic |
| Contributing office(s) | Upper Midwest Environmental Sciences Center |
| Description | 5 p. |
| First page | 1141 |
| Last page | 1145 |