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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F12%3A10126438%21RIV13-MSM-11310___
rdf:type
n8:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.chroma.2012.01.069
dcterms:description
We have developed a new microextraction technique for equilibrium, non-exhaustive analyte pre-concentration from aqueous solutions into organic solvents lighter than water. The key point of the method is application of specially designed and optimized bell-shaped extraction device, BSED. The technique has been tested and applied to the preconcentration of selected volatile and semi volatile compounds which were determined by gas chromatography/mass spectrometry in spiked water samples. The significant parameters of the extraction have been found using chemometric procedures and these parameters were optimized using the central composite design (CCD) for two solvents. The analyte preconcentration factors were in a range from 8.3 to 161.8 (repeatability from 7 to 14%) for heptane, and 50.0-105.0 (repeatability from 0 to 5%) for tert-butyl acetate. The reproducibility of the technique was within 1-8%. The values of limits of detection and determination were 0.1-3.3 ng mL(-1) for heptane and 0.3-10.7 ngmL(-1) for tert-butyl acetate. The new microextraction technique has been found to be a cheap, simple and flexible alternative to the common procedures, such as SPME or LLME. This BSED-LLME technique can also be combined with other separation methods, e.g.. HPLC or CE. We have developed a new microextraction technique for equilibrium, non-exhaustive analyte pre-concentration from aqueous solutions into organic solvents lighter than water. The key point of the method is application of specially designed and optimized bell-shaped extraction device, BSED. The technique has been tested and applied to the preconcentration of selected volatile and semi volatile compounds which were determined by gas chromatography/mass spectrometry in spiked water samples. The significant parameters of the extraction have been found using chemometric procedures and these parameters were optimized using the central composite design (CCD) for two solvents. The analyte preconcentration factors were in a range from 8.3 to 161.8 (repeatability from 7 to 14%) for heptane, and 50.0-105.0 (repeatability from 0 to 5%) for tert-butyl acetate. The reproducibility of the technique was within 1-8%. The values of limits of detection and determination were 0.1-3.3 ng mL(-1) for heptane and 0.3-10.7 ngmL(-1) for tert-butyl acetate. The new microextraction technique has been found to be a cheap, simple and flexible alternative to the common procedures, such as SPME or LLME. This BSED-LLME technique can also be combined with other separation methods, e.g.. HPLC or CE.
dcterms:title
Bell-shaped extraction device assisted liquid-liquid microextraction technique and its optimization using response-surface methodology Bell-shaped extraction device assisted liquid-liquid microextraction technique and its optimization using response-surface methodology
skos:prefLabel
Bell-shaped extraction device assisted liquid-liquid microextraction technique and its optimization using response-surface methodology Bell-shaped extraction device assisted liquid-liquid microextraction technique and its optimization using response-surface methodology
skos:notation
RIV/00216208:11310/12:10126438!RIV13-MSM-11310___
n8:predkladatel
n9:orjk%3A11310
n4:aktivita
n6:I n6:S n6:Z
n4:aktivity
I, S, Z(MSM0021620857)
n4:cisloPeriodika
March
n4:dodaniDat
n5:2013
n4:domaciTvurceVysledku
n10:4794230 n10:8321701
n4:druhVysledku
n21:J
n4:duvernostUdaju
n13:S
n4:entitaPredkladatele
n16:predkladatel
n4:idSjednocenehoVysledku
124676
n4:idVysledku
RIV/00216208:11310/12:10126438
n4:jazykVysledku
n18:eng
n4:klicovaSlova
Gas chromatography; Response-surface methodology; Liquid-liquid microextraction
n4:klicoveSlovo
n15:Gas%20chromatography n15:Response-surface%20methodology n15:Liquid-liquid%20microextraction
n4:kodStatuVydavatele
NL - Nizozemsko
n4:kontrolniKodProRIV
[7C3FDD74FF87]
n4:nazevZdroje
Journal of Chromatography A
n4:obor
n20:CB
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
2
n4:rokUplatneniVysledku
n5:2012
n4:svazekPeriodika
1230
n4:tvurceVysledku
Bursová, Miroslava Čabala, Radomír
n4:wos
000301959700004
n4:zamer
n17:MSM0021620857
s:issn
0021-9673
s:numberOfPages
6
n19:doi
10.1016/j.chroma.2012.01.069
n14:organizacniJednotka
11310