On-line trace enrichment for determination of aldicarb species in water, using liquid chromatography with post-column derivatization

Journal Article · Sat Nov 01 04:00:00 EST 1986 · J. Assoc. Off. Anal. Chem.; (United States)

OSTI ID:6943257

Chaput, D

Liquid chromatography combining on-line trace enrichment together with a very selective detection technique is used for the determination of aldicarb, aldicarb sulfoxide, and aldicarb sulfone. Sensitivity is increased by loading a 10 mL volume of ground water on a concentrator column installed in the loop position of a 6-port injection valve. Switching the valves allows the concentrated material to be backflushed onto the analytical column by a methanol-water gradient mobile phase. Separation is followed by post-column hydrolysis to yield methylamine, and formation of a fluorophore with o-phthalaldehyde and 2-mercaptoethanol prior to fluorescence detection. The process requires virtually no sample cleanup and provides good precision on recoveries from different matrixes. Minimum detection limit, defined as 5 times baseline noise, is less than 70 ng/L for the 3 compounds.

• Research Organization: National Hydrology Research Institute, Ottawa, Ontario
• OSTI ID: 6943257
• Journal Information: J. Assoc. Off. Anal. Chem.; (United States), Journal Name: J. Assoc. Off. Anal. Chem.; (United States) Vol. 6; ISSN JANCA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
HYDROGEN COMPOUNDS
MEASURING METHODS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SEPARATION PROCESSES
WATER