Determination of Alachlor and Its Sulfonic Acid Metabolite in Water by Solid-Phase Extraction and Enzyme-Linked Immunosorbent Assay

1994 ◽  
Vol 66 (9) ◽  
pp. 1495-1499 ◽  
Author(s):  
D. S. Aga ◽  
E. M. Thurman ◽  
M. L. Pomes
Keyword(s):  
Solid Phase Extraction ◽  
Immunosorbent Assay ◽  
Sulfonic Acid ◽  
Solid Phase ◽  
Enzyme Linked Immunosorbent Assay ◽  
Phase Extraction ◽  
Acid Metabolite

Determination of Phenol Sulfone, Phenol Sulfoxide, and Phenol Sulfonic Acid Metabolites of Fenamiphos in Soil by Liquid Chromatography

1995 ◽  
Vol 78 (5) ◽  
pp. 1286-1293
Author(s):  
Gregory C Mattern ◽  
Gilbert D Parker ◽  
Debra L Green ◽  
Gregory L Yeutter
Keyword(s):  
Liquid Chromatography ◽  
Solid Phase Extraction ◽  
Sulfonic Acid ◽  
Solid Phase ◽  
Reversed Phase ◽  
Uv Detection ◽  
Phase Extraction ◽  
Soil Matrix ◽  
Phase Liquid

Abstract An analytical method has been developed to quantitate fenamiphos phenol sulfone, phenol sulfoxide, and phenol sulfonic acid in soil. Both control and analyte-fortified soil samples from Fresno, CA, were extracted with methanol–water (2 + 1) and partitioned with ethyl acetate. Fenamiphos phenol sulfone and phenol sulfoxide were determined by re-versed-phase liquid chromatography (LC) with UV detection at 240 nm after cleanup by silica solid-phase extraction. Fenamiphos phenol sulfonic acid was determined by reversed-phase ion-pairing LC with UV detection at 240 nm after cleanup by amino solid-phase extraction. Recoveries of fenamiphos phenol sulfoxide ranged from 88.2 to 111.0%, with an average of 97.4%. Recoveries of fenamiphos phenol sulfone ranged from 101.6 to 107.0%, with an average of 104.6%. Recoveries of fenamiphos phenol sulfonic acid ranged from 76.0 to 99.9%, with an average of 86.0%. Responses for analysis of analytes in both solvent and soil matrix were linear over the tested range of 10 to 500 ppb. Limits of determination of each analyte in soil were less than 10 ppb.

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