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- Title
DETERMINACIÓN DE KRESOXIM-METIL Y TRIFLOXYSTROBIN EN MUESTRAS DE AGUA MEDIANTE MICROEXTRACCIÓN CON GOTA SUSPENDIDA Y CROMATOGRAFÍA DE GASES-ESPECTROMETRÍA DE MASA.
- Authors
Araujo, Lilia; Sánchez, Gizelle; Cubillán, Dalia; Mercado, Jair; Troconis, María; Prieto, Avismelsi
- Abstract
A method for determination of trace amounts of the fungicides kresoxim-methyl and trifloxystrobin in water samples, previous single-drop microextraction, was developed using gas chromatography-mass spectrometry. The effects of organic solvent, stirring speed , drop volume, ionic strength, sample volume, extraction time as well as the extraction temperature were studied. Both fungicides were extracted using 2 μL of n-heptane. The linear concentration range of application was 0.2-10.0 μg/L (r = 0,998-0,999) for both compounds, with detection limits of 4.0 ng/L for kresoxim-methyl and 7.0 ng/L for trifloxystrobin. The method was validated by analysis of spiked matrix samples. Recovery levels were between 83.0 and 109.6%. In view of its simplicity, low cost and sensitivity, the proposed method is applicable for the quantification of residues of kresoxim-methyl and trifloxystrobin in water samples.
- Subjects
EXTRACTION (Chemistry); TRIFLOXYSTROBIN; GAS chromatography; AGRICULTURAL chemicals; PESTICIDES
- Publication
Avances en Ciencias e Ingeniería, 2012, Vol 3, Issue 2, p97
- ISSN
0718-8706
- Publication type
Article