This HTML5 document contains 54 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dctermshttp://purl.org/dc/terms/
n20http://localhost/temp/predkladatel/
n19http://linked.opendata.cz/resource/domain/vavai/projekt/
n5http://linked.opendata.cz/resource/domain/vavai/riv/tvurce/
n17http://linked.opendata.cz/resource/domain/vavai/subjekt/
n11http://linked.opendata.cz/ontology/domain/vavai/
n14http://linked.opendata.cz/resource/domain/vavai/zamer/
shttp://schema.org/
skoshttp://www.w3.org/2004/02/skos/core#
n3http://linked.opendata.cz/ontology/domain/vavai/riv/
n16http://bibframe.org/vocab/
n2http://linked.opendata.cz/resource/domain/vavai/vysledek/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n18http://linked.opendata.cz/resource/domain/vavai/vysledek/RIV%2F60461373%3A22330%2F12%3A43894736%21RIV13-MSM-22330___/
n6http://linked.opendata.cz/ontology/domain/vavai/riv/klicoveSlovo/
n21http://linked.opendata.cz/ontology/domain/vavai/riv/duvernostUdaju/
xsdhhttp://www.w3.org/2001/XMLSchema#
n10http://linked.opendata.cz/ontology/domain/vavai/riv/jazykVysledku/
n8http://linked.opendata.cz/ontology/domain/vavai/riv/aktivita/
n15http://linked.opendata.cz/ontology/domain/vavai/riv/obor/
n4http://linked.opendata.cz/ontology/domain/vavai/riv/druhVysledku/
n13http://reference.data.gov.uk/id/gregorian-year/

Statements

Subject Item
n2:RIV%2F60461373%3A22330%2F12%3A43894736%21RIV13-MSM-22330___
rdf:type
skos:Concept n11:Vysledek
dcterms:description
In this work, a new rapid method for the determination of 135 pesticide residues in green and black dry tea leaves and stalks employing gas chromatography coupled to tandem mass spectrometry (GC-MS/MS) with a triple quadrupole was developed and validated. A substantial simplification of sample processing prior to the quantification step was achieved: after addition of water to a homogenised sample, transfer of analytes into an acetonitrile layer was aided by the addition of inorganic salts. Bulk co-extracts, contained in the crude organic extract obtained by partition, were subsequently removed by liquid-liquid extraction using hexane with the assistance of added 20% (w/w) aqueous NaCl solution. The importance of matrix hydration prior to the extraction for achieving good recoveries was demonstrated on tea samples with incurred pesticide residues. For most of the analytes, recoveries in the acceptable range of 70-120% and repeatabilities (relative standard deviations, RSDs) ?20% were achieved for both matrices at spiking levels of 0.01, 0.1 and 1 mg kg?1. Under optimised GC-MS/MS conditions, most of the analytes gave lowest calibration level ?0.01 mg kg?1, permitting the control at the maximum residue levels (MRLs) laid down in Regulation (EC) No 396/2005. The developed method was successfully applied to the determination of pesticide residues in real tea samples. In this work, a new rapid method for the determination of 135 pesticide residues in green and black dry tea leaves and stalks employing gas chromatography coupled to tandem mass spectrometry (GC-MS/MS) with a triple quadrupole was developed and validated. A substantial simplification of sample processing prior to the quantification step was achieved: after addition of water to a homogenised sample, transfer of analytes into an acetonitrile layer was aided by the addition of inorganic salts. Bulk co-extracts, contained in the crude organic extract obtained by partition, were subsequently removed by liquid-liquid extraction using hexane with the assistance of added 20% (w/w) aqueous NaCl solution. The importance of matrix hydration prior to the extraction for achieving good recoveries was demonstrated on tea samples with incurred pesticide residues. For most of the analytes, recoveries in the acceptable range of 70-120% and repeatabilities (relative standard deviations, RSDs) ?20% were achieved for both matrices at spiking levels of 0.01, 0.1 and 1 mg kg?1. Under optimised GC-MS/MS conditions, most of the analytes gave lowest calibration level ?0.01 mg kg?1, permitting the control at the maximum residue levels (MRLs) laid down in Regulation (EC) No 396/2005. The developed method was successfully applied to the determination of pesticide residues in real tea samples.
dcterms:title
Streamlining sample preparation and gas chromatography-tandem mass spectrometry analysis of multiple pesticide residues in tea Streamlining sample preparation and gas chromatography-tandem mass spectrometry analysis of multiple pesticide residues in tea
skos:prefLabel
Streamlining sample preparation and gas chromatography-tandem mass spectrometry analysis of multiple pesticide residues in tea Streamlining sample preparation and gas chromatography-tandem mass spectrometry analysis of multiple pesticide residues in tea
skos:notation
RIV/60461373:22330/12:43894736!RIV13-MSM-22330___
n11:predkladatel
n17:orjk%3A22330
n3:aktivita
n8:P n8:Z
n3:aktivity
P(LH11059), Z(MSM6046137305)
n3:cisloPeriodika
743
n3:dodaniDat
n13:2013
n3:domaciTvurceVysledku
n5:3901556 n5:5729998 n5:8580588 n5:9219943 n5:1283243
n3:druhVysledku
n4:J
n3:duvernostUdaju
n21:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
171623
n3:idVysledku
RIV/60461373:22330/12:43894736
n3:jazykVysledku
n10:eng
n3:klicovaSlova
tandem mass spectrometry (MS/MS); gas chromatography (GC); sample preparation; pesticide residue; Tea
n3:klicoveSlovo
n6:tandem%20mass%20spectrometry%20%28MS%2FMS%29 n6:sample%20preparation n6:gas%20chromatography%20%28GC%29 n6:pesticide%20residue n6:Tea
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[8B84752E2497]
n3:nazevZdroje
Analytica Chimica Acta
n3:obor
n15:GM
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
7
n3:projekt
n19:LH11059
n3:rokUplatneniVysledku
n13:2012
n3:svazekPeriodika
2012
n3:tvurceVysledku
Čajka, Tomáš Sandy, C. Hajšlová, Jana Kalachová, Kamila Bachanová, V. Drábová, Lucie Pulkrabová, Jana
n3:wos
000308054100006
n3:zamer
n14:MSM6046137305
s:issn
0003-2670
s:numberOfPages
10
n16:doi
10.1016/j.aca.2012.06.051
n20:organizacniJednotka
22330