29811
2013
deu
1241
1243
Dezember
61
article
Wiley-VCH Verl.
Weinheim
Gesellschaft Deutscher Chemiker
1
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Unpolarer Analyt, unpolare Matrix: das Mykotoxin Zearalenon in Öl
Nachrichten aus der Chemie
32745
1439-9598
1521-3854
Sonderstandort: Publica-Schrank
03.01.2014
S. Weiz
S. Marten
J. Heinze
Sarah Drzymala
Matthias Koch
deu
uncontrolled
Mykotoxine
deu
uncontrolled
HPLC
deu
uncontrolled
Online-SPE
deu
uncontrolled
Hydrazine
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
30080
2014
deu
24
27
Januar
article
Wiss. Verl.-Ges.
Stuttgart
1
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Zearalenon auf der Spur - Hochselektive Mykotoxin-Bestimmung in Speiseöl
Das neue Verfahren ermöglicht die direkte Analyse des Mykotoxins Zearalenon aus Speiseölen in Kombination mit einer hochselektiven Probenvorbereitung. Dies wird in einem automatisierten Online-SPE-HPLC-Prozess abgebildet, sodass ene routinemäßige Kontrolle des EU-Grenzwertes möglich ist.
Deutsche Lebensmittel-Rundschau
33024
0012-0413
1869-2214
30.01.2014
S. Weiz
S. Marten
J. Heinze
Sarah Drzymala
Matthias Koch
deu
uncontrolled
Mykotoxine
deu
uncontrolled
HPLC
deu
uncontrolled
Online-SPE
deu
uncontrolled
Hydrazine
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
33067
2015
eng
3489
3497
12
407
article
Springer
Berlin
1
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Automated solid-phase extraction coupled online with HPLC-FLD for the quantification of zearalenone in edible oil
Established maximum levels for the mycotoxin zearalenone (ZEN) in edible oil require monitoring by reliable analytical methods. Therefore, an automated SPE-HPLC online system based on dynamic covalent hydrazine chemistry has been developed. The SPE step comprises a reversible hydrazone formation by ZEN and a hydrazine moiety covalently attached to a solid phase. Seven hydrazine materials with different properties regarding the resin backbone, pore size, particle size, specific surface area, and loading have been evaluated. As a result, a hydrazine-functionalized silica gel was chosen. The final automated online method was validated and applied to the analysis of three maize germ oil samples including a provisionally certified reference material. Important performance criteria for the recovery (70–120 %) and precision (RSDr <25 %) as set by the Commission Regulation EC 401/2006 were fulfilled: The mean recovery was 78 % and RSDr did not exceed 8 %. The results of the SPE-HPLC online method were further compared to results obtained by liquid&–liquid extraction with stable isotope dilution analysis LC-MS/MS and found to be in good agreement. The developed SPE-HPLC online system with fluorescence detection allows a reliable, accurate, and sensitive quantification (limit of quantification, 30 µg/kg) of ZEN in edible oils while significantly reducing the workload. To our knowledge, this is the first report on an automated SPE-HPLC method based on a covalent SPE approach.
Analytical and bioanalytical chemistry
36146
10.1007/s00216-015-8541-5
1618-2642
1618-2650
22.04.2015
Sarah Drzymala
S. Weiz
J. Heinze
S. Marten
Carsten Prinz
Annett Zimathies
L.-A. Garbe
Matthias Koch
eng
uncontrolled
Dynamic covalent hydrazine chemistry (DCHC)
eng
uncontrolled
Maize germ oil
eng
uncontrolled
Food
eng
uncontrolled
Mycotoxin
eng
uncontrolled
ZEA
eng
uncontrolled
Isomerisation
eng
uncontrolled
Occurrence
eng
uncontrolled
Edible oil
eng
uncontrolled
SIDA
eng
uncontrolled
LC-MS/MS
eng
uncontrolled
Quantification
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")