Determination of picomolar concentrations of carbonyl compounds in natural waters, including seawater, by liquid chromatography
- Univ. of Miami, FL (USA)
Low molecular weight carbonyl compounds in natural waters were determined at picomolar to nanomolar levels by derivatization with 2,4-dinitrophenylhydrazine followed by liquid chromatography. The uniqueness of the method is attributed to the extremely low blanks obtained and the minimal sample preparation involved. The detection limit for direct injection of derivatized natural water samples is 0.5 nM for aldehydes and 5 nM for ketones with a precision of {approximately}7% RSD at the 30 nM level for aldehydes. The detection limit can be further lowered by using off-line cartridge enrichment in which derivatized natural water is passed through a C18 extraction cartridge. Recoveries for the enrichment method were 95-105% for a sample volume of 20 mL and for concentrations of carbonyl compounds in the 1-30 nM range. A field procedure for storage of derivatized sample extracts for extended periods is also presented. Applications of enrichment and sample storage techniques to marine and estuarine waters are presented.
- OSTI ID:
- 5465175
- Journal Information:
- Environmental Science and Technology; (United States), Vol. 24:10; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of sub-parts-per-billion levels of carbonyl compounds in marine air by a simple cartridge trapping procedure followed by liquid chromatography
Characterization of oxidized coal surfaces: Quarterly report, May 1987-July 1987
Related Subjects
01 COAL, LIGNITE, AND PEAT
CARBONYLS
LIQUID COLUMN CHROMATOGRAPHY
ALDEHYDES
CHEMICAL ANALYSIS
GROUND WATER
KETONES
MEASURING METHODS
SEAWATER
CHROMATOGRAPHY
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SEPARATION PROCESSES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects