On-line trace enrichment of difenzoquat in water and its determination by HPLC

Journal Article · Sat Jan 01 00:00:00 EST 1983 · J. Environ. Sci. Health, Part B; (United States)

DOI:https://doi.org/10.1080/03601238309372364· OSTI ID:5510928

Ahmad, I

A high performance liquid chromatographic method involving an integrated enrichment step is described for the quantitative determination of low levels of difenzoquat residues in water. Difenzoquat is trapped from the flowing water sample by strong adsorption onto the enrichment column. It is then desorbed, separated, and subsequently analyzed in a single step process by reverse phase high performance liquid chromatography using ultraviolet detection at 255 nm. Average recovery of difenzoquat from organic free water at spiking levels of 20, 10 and 5 ppb was 97.0%. The lower detection limit reached was 0.25 ppb difenzoquat in organic free water.

• Research Organization: Alberta Environmental Centre, Vegreville, Canada
• OSTI ID: 5510928
• Journal Information: J. Environ. Sci. Health, Part B; (United States), Vol. 18:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
HERBICIDES
LIQUID COLUMN CHROMATOGRAPHY
WATER
CHEMICAL ANALYSIS
PYRAZOLES
RECOVERY
WATER POLLUTION
AZOLES
CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PESTICIDES
POLLUTION
SEPARATION PROCESSES
400105* - Separation Procedures
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)