A restricted access medium column for the trace determination of triadimefon and tetraconazole in water with large-volume injection coupled-column RPLC with UV detection

Coupled-column liquid chromatography (LC-LC) with ultraviolet detection was used for the trace level determination of triadimefon and tetraconazole in groundwater samples. A sample volume of 5.0 ml was directly injected into the chromatographic system, using a restricted access medium (RAM) 5 mu m G...

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Published inAnalyst (London) Vol. 125; no. 9; pp. 1549 - 1553
Main Authors PARRILLA VAZQUEZ, P, MARTINEZ VIDAL, J. L, MARTINEZ FERNANDEZ, J
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2000
Subjects
Analytical chemistry
Applied sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Groundwaters
Natural water pollution
Other chromatographic methods
Pollution
Water treatment and pollution
Spain, Andalucia, Almeria
Trace analysis
Five membered ring
Chemical analysis
Column switching
Nitrogen heterocycle
Pesticides
Fungicide
Liquid liquid chromatography
Environmental control
Reversed phase chromatography
Multicomponent analysis
Ultraviolet detector
Triazole derivatives
Water pollution
Ground water
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Summary:Coupled-column liquid chromatography (LC-LC) with ultraviolet detection was used for the trace level determination of triadimefon and tetraconazole in groundwater samples. A sample volume of 5.0 ml was directly injected into the chromatographic system, using a restricted access medium (RAM) 5 mu m GFF-II (ISRP, Pinkerton) analytical column (50 x 4.6 mm id) as a first column coupled to a 5 mu m reversed-phase Hypersil C sub(18) analytical column (50 x 4.6 mm id). In comparison with an analytical C sub(18) column, the RAM column substantially improved the separation between analytes and humic acid interferent. Detection limits <0.1 mu g l super(-1) were reached without a preconcentration step. Average recoveries were between 92 and 112% (n = 6) with RSD between 0.6 and 8%. The overall procedure allowed a sample throughput of up to 45 samples per day. Groundwater samples from El Ejido (Almeria, Spain) were analyzed by means of the proposed LC-LC procedure.
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ISSN:0003-2654
1364-5528
DOI:10.1039/b003573o