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CHROMABOND® QuEChERS extraction buffer mixes / clean-up mixes

QuEChERS method and pre-mixes
Within a few years after its devleopment by Anastassiades et al. the QuEChERS method has gained a leading position for determination of pesticide residues in food by GC-MS or LC-MS allowing rapid and cheap clean-up of strong matrix-contaminated samples.
Standard clean-up of food samples
10 g sample are homogenised with 10 ml acetonitrile. After adding the internal standard the sample is shaken with 4 g MgSO4 and 1 g NaCI and afterwards centrifuged. 1 ml of the supernantant is spiked with 25 mg CHROMABOND® Diamino and 150 mg MgSO4 and shaken again. After centrifugation the supernatant is injected into the GC/MS.

For optimising the extraction of pH-dependent compounds, for minimising decomposition of sensitive substances and for broadending the matrix spectrum, different modifications of the QuEChERS method have been elaborated. Extraction mixtures for sample preparation for determination of pesticides in food samples.

MACHEREY-NAGEL offers a number of individually weighed and pre-mixed buffers and extraction mixtures, specially composed for different sample matrices.
Mix I and Mix II are extraction mixtures, Mix III to Mix VI are clean-up mixtures.

The food samples will be extracted with either Mix I or Mix II.
Afterwards they will be purified with one of the following mixtures:

  • Mix III (samples with low fat content; e.g. apples, strawberries),
  • Mix IV (moderate content of chlorophyll and carotinoids; e. g. carrots, lettuce),
  • Mix V (high content of chlorophyll and carotinoids; e. g. bell peppers, spinach),
  • Mix VI (high fat content; e. g. avocados).

Every mix is prepacked in a 15 ml centrifuge tube. Pack of 50 pieces.

CHROMABOND® QuEChERS extraction buffer mixes / clean-up mixes

CHROMABOND® QuEChERS extraction buffer mixes / clean-up mixes



Macherey-Nagel CHROMABOND QuEChERS Mix VI 730974
PART NO.4AJ-4003828
14182||65043||36317||14898
Description||Capacity ml||Composition||PK
Mix VI Diamino/C18 ec Clean-up Mix||15||0.15g CHROMABOND® Diamino
with 0.9g MgSO4 and 150mg C18 ec||50
Macherey-Nagel
730974

SPE phases CHROMABOND® QuEChERS

0
1
6
1
List Price: £105.79
Out of Stock
Macherey-Nagel CHROMABOND QuEChERS Mix IV 730973
PART NO.4AJ-4003827
14182||65043||36317||14898
Description||Capacity ml||Composition||PK
Mix IV Diamino/Carbon Clean-up Mix||15||0.15g CHROMABOND® Diamino
with 0.9g MgSO4 and 15mg Carbon||50
Macherey-Nagel
730973

SPE phases CHROMABOND® QuEChERS

0
6
4
1
List Price: £130.71
Out of Stock
Macherey-Nagel CHROMABOND QuEChERS Mix III 730972
PART NO.4AJ-4003826
14182||65043||36317||14898
Description||Capacity ml||Composition||PK
Mix III Diamino Clean-up Mix||15||0.15g CHROMABOND® Diamino
with 0.9g MgSO4||50
Macherey-Nagel
730972

SPE phases CHROMABOND® QuEChERS

0
3
3
1
List Price: £105.79
Out of Stock
Macherey-Nagel CHROMABOND QuEChERS Mix II MgSO4-Extrac 730971
PART NO.4AJ-4003825
14182||65043||36317||14898
Description||Capacity ml||Composition||PK
Mix II Acetat-Extraction-Mix||15||6g MgSO4, 1.5g Na acetate||50
Macherey-Nagel
730971

SPE phases CHROMABOND® QuEChERS

0
2
2
1
List Price: £145.03
Out of Stock
Macherey-Nagel CHROMABOND QuEChERS Mix I Citrate 730970
PART NO.4AJ-4003824
14182||65043||36317||14898
Description||Capacity ml||Composition||PK
Mix I Citrat-Extraction-Mix||15||4g MgSO4, 1g NaCl, 0.5g Na2H citrate
1.5 H2O, 1g Na3 citrate, 2 H2O||50
Macherey-Nagel
730970

SPE phases CHROMABOND® QuEChERS

0
3
0
1
List Price: £126.90
Out of Stock
Macherey-Nagel CHROMABOND QuEChERS Mix V 730975
PART NO.4AJ-4003829
14182||65043||36317||14898
Description||Capacity ml||Composition||PK
Mix V Diamino/Carbon Clean-up Mix||15||0.15g CHROMABOND® Diamino
with 0.9g MgSO4 and 45mg Carbon||50
Macherey-Nagel
730975

SPE phases CHROMABOND® QuEChERS

0
6
5
1
List Price: £130.71
Out of Stock


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