implementinga 2d-lc-q-tof screeningmethod - eurl2018. 10. 3. · 2d-lc esi + bromuconazole...
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![Page 1: Implementinga 2D-LC-Q-Tof screeningmethod - EURL2018. 10. 3. · 2D-LC ESI + Bromuconazole Cyflufenamide Fenpyrazamin Isopyrazam Novaluron Penthiopyrad Pyridalyl Spinetoram Spirotetramat-enol](https://reader036.vdocuments.us/reader036/viewer/2022071610/6149d4ca12c9616cbc6904a0/html5/thumbnails/1.jpg)
Implementing a 2D-LC-Q-Tof screening method
Using the EPIC-System by JAS
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Seite 2
Starting point of investigations
• broaden analytical scope for Q-ToF screening method to include
• „borderline“ SRM analytes (propamocarb, cyromazine, nicotine)
• metabolites from complex residue definitions
• HPLC-Q-ToF method not valid using QuEChERS for 45 out of 78
analytes (at SDL 0.01 mg/kg) �
• causes:
• analytes not detected because of ion suppression by Matrix
How to get rid of matrix?
by orthognonal LC separation using HILIC und RP
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
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2D-LC consists of:
Seite 3
RP Pump
EPICS
AS
Q-ToFHILIC pump
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
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EPICS consists of:
Seite 4
Easy Pesticide Isolation and Concentration System (EPICS)
Valve 1 (10 port)
Valve 2 (6 port)
C8 Trap RPHILIC
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
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Seite 5
Phase I
� column equilibration
Fig: Operating Manual EPICS Version 1.05 (Fa. JAS)
How does it work?
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
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Seite 6
Fig: Operating Manual EPICS Version 1.05 (Fa. JAS)
How does it work?
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
Phase II
� HILIC: nonpolar
analytes elute first
� Trap: trapping (water
addition from RP!)
� polar analytes and
matrix retain strongly
on HILIC
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Seite 7
Phase III
�Trap: no flow, analytes
remain on trap column
�HILIC: polar analytes
are measured directly
How does it work?
Fig: Operating Manual EPICS Version 1.05 (Fa. JAS)
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
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Seite 8
How does it work?
Fig: Operating Manual EPICS Version 1.05 (Fa. JAS)
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
Phase IV
�HILIC: elution of matrix
components to waste
�Trap: elution of
trapped pesticides to
RP
� RP: gradient for
pesticide separation,
detection via Q-ToF
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Etofenpro
x
AcephateCyromazine
AmitroleSpiroxamine
Nicotine
phase IVphase IIIphase IIphase I
RT difference (∆RT 3 min)
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides Seite 9
phase I: column equilibrationphase II: trappingphase III: detection of polar analytes eluting from HILICphase IV: RP separation of trapped analytes
EPICS Phases
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EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides Seite 10
phase I: column equilibrationphase II: trappingphase III: detection of polar analytes eluting from HILICphase IV: RP separation of trapped analytes
EPICS Phases
phase IVphase III
phase II
phase I
Complete 2D-LC separation chromatogram
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Implementing a 2D-LC-Q-Tof screening method
Optimisation of HILIC and RP separation
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Extraction/Injection
Seite 12
JAS NRL
Extraction ACN + water*ACN + water
+ QuEChERS salts
Injection ACN/water mixture** ACN phase
Injectionvolume
5 µL 20 µl
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
*problems because phase separation for some matrices (kiwi, beet root etc.)**peak shape very broad for some analytes (cyromazine, propamocarb etc.)
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2D-LC - first dimension
Seite 13
JAS NRL
flow 0.2 ml/min 0.3 ml/min
temperature 30 °C 40 °C
bufferESI+ 100 mM NH4-formate (pH 3.2)ESI- 100 mM NH4-acetate (pH 5.8)
HILIC eluent
A: 5 mM NH4-formate in H2O +0.1 % formic acid
B: 5 mM NH4-formate in ACN/H2O (90/10) + 0.1 % formic acid
A: H2O/buffer (95/5)
B: ACN/H2O/buffer (95/5/5)
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
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2D-LC - first dimension
Seite 14
JAS NRL
column YMC-Pack Diol YMC-Triart Diol
HILIC gradient% B
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
An
teil
Elu
en
t B
in
%
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Seite 15
JAS NRL
RP eluent
A: 5 mM NH4-formate in H2O + 0.1 % formic acid
B: 5 mM NH4-formate in MeOH+ 0.1 % formic acid
A: H2O/buffer (95/5)
B: ACN/buffer (95/5)
RP columnPoroshell-C18
(2.1 mm × 100 mm; 2.7 µm; 120 Å)Synergi Fusion-RP
(2,0 mm × 150 mm; 4 µm; 80 Å)
RP gradient% B
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
0
20
40
60
80
100
0 10 20 30 400
20
40
60
80
100
0 10 20 30 40
2D-LC - second dimension
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2D-LC vs QuEChERS
Comparison of validation results
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EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides Seite 17
Non-valid QuEChERSanalytes
45 non valid withQuEChERS at
SDL 0.01 mg/kg
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EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides Seite 18
Acetamiprid � � � � � � � � � � � X � � � � X � � �
Aldicarb X X X X X X X X X X X X X X X X X X X X
Azoxystrobin � � � � X X � � � � � � X � X X � � � �
Bitertanol X X � � X X � � � � � � � � X X � � � �
Boscalid � � � � X X � � � � � � � � X X � � � �
Bromuconazole � � � � X X � � � � � � � � X X � � � �
Buprofezin � � � � � � � � � � � � � � � � � � � �
Carbendazim X � � � � � � � � � � � � � X X � X � �
Carbofuran X X � � X X � � � � � � � � � � � � � �
Carboxin � � � � X X � � � � � � � � � � � � � �
Chlordimeform X X � � X X X X � � X X X X X X X X X X
Clethodim � � � � X X � � � � � � � X X X � � � �
Coumaphos � � � � X X � � � � � � � � � � � � � �
Cyprodinil � � � � � � � � � � � � � � � � � � � �
Cyromazine X X � � X X X X � � X X X X X X � � X X
Demeton-S-methyl X X X X X X X X X X X X X X X X X X X X
Demeton-S-methylsulfoxide � � � � X X � � � � � � � � � � � � � �
Diazinon � � � � � � � � � � � � � � � � � � � �
Dimethoate � � � � X X � � � � � � � � � � � � � �
Dimethomorph � � � � X X � � � � X X X X X X X X � �
Diniconazole � � � � X X � � � � X X X X X X � � � �
Ethion � � � � X X � � � � � � � � � � � � � �
Ethoxyquin X X X X X X � � � � � � � � � X � � � �
Fenamidone � � � � X X � � � � � � � � � � � � � �
Fenpiclonil X X X X X X X X � X X X X X X X X X X X
Flucythrinate � � � � X X � � � � � � � � � � � � � �
Furathiocarb � � � � � � � � � � � � � � � � � � � �
Hexaconazole � � � � X X � � � � X X � � X X � � � �
Malathion � � � � X X � � � � � � � � � � � � � �
Mecarbam � � � � X X � � � � � � � � X � � � � �
Methidathion X X X X X X X X X X X X X X X X X X X X
Myclobutanil X X � � X X X X � � � � � � � X � � � �
Nicotine X X � � X X � � X X X X X X X X X X X X
Paraoxon-methyl X X � � X X � � � � � � � � � � � � � �
Picoxystrobin � � � � � � � � � � � � � � � � � � � �
Pirimicarb � � � � � � � � � � � � � � � � � � � �
Pirimiphos-methyl � � � � � � � � � � � � � � � � � � � �
Propiconazole � � � � X X � � � � � � X X X X � � � �
Pyraclostrobin � � � � � � � � � � � � X X X X � � X �
Pyridaben � � � � � � � � � � � � � � X X � � � �
Quinoclamine X X X X X X X X X X X X X � X X � � � �
Quizalofop-ethyl � � � � � � � � � � � � X X X X X X � �
Sulfotep � � � � X X � � � � � � � � � � � � � �
Tebufenpyrad X � � � � � � � � � � � � � � � � � � �
Thiacloprid � � � � X X � � � � � � � � � � � � � �
Short Validation 2D-LC
Detection rate could be improvedwith 2D-LC at SDL
0.01 mg/kg
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2D-LC vs QuEChERS
Comparison EUPT-FV-SM09 Lemon
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Seite 20
2D-LC vs QuEChERS –EUPT-FV-SM09
QuEChERS ESI +
Bromuconazole
Fenpyrazamin
Isopyrazam
Novaluron
Penthiopyrad
Pyridalyl
Spinetoram
Spirotetramat-enol
Vailfenate
2D-LC ESI +
Bromuconazole
Cyflufenamide
Fenpyrazamin
Isopyrazam
Novaluron
Penthiopyrad
Pyridalyl
Spinetoram
Spirotetramat-enol
Tricyclazole
Vailfenate
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
2D-LC ESI -
Fipronil
Flubendiamid
Isopyrazam
Novaluron
Penthiopyrad
QuEChERS ESI -
Fipronil
Flubendiamid
Isopyrazam
Novaluron
Penthiopyrad
• Orthosulfamuron: FN not in
Database and no analytical
standard in 2017
• Tricyclazole: FN not reported
because not verified with GC
• Spirotetramat-enol not
identified by organizers (FP)
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2D-LC vs QuEChERS
Evaluation of clean up in terms of matrixcomponents
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Using MassProfiler
11./12. Oktober 201822. EPRA-Sitzumg - BVL - Sandra Mühlwald Seite 22
QuEChERS
EPICS
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Compound Mass Profinder
11./12. Oktober 201822. EPRA-Sitzumg - BVL - Sandra Mühlwald Seite 23
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Summary and Outlook
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides Seite 24
• 2D-LC results in a better detection rate of analytes that could not be
validated after QuEChERS clean-up
• this could be due to changed elution profiles => no co-elution of
analyte and matrix compounds
• higher injection volumes are possible with HILIC
• no analyte loss during sample preparation in 2D-LC
• further investigations to compare the two clean-up methods and to
better understand matrix effects are in progress
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Seite 25
Acknowledgements
EURL WS Almería 2018Nadja Buchner Sandra Mühlwald - NRL for pesticides
Sandra Mühlwald Nina Meyburg
Thank you!
Prof. L. W. Kroh