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QuEChERS – a Simplified
Method of Sample Preparation for Pesticide Analysis
In 2003, it is a simple way to prepare
food samples for pesticide analysis. It's
called QuEChERS, an acronym for Quick, Easy,
Cheap, Effective, Rugged and Safe. With QuEChERS, you could prepare your
samples in multi-class, multi-residue
pesticide analysis while saving time and money. |
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How
QuEChERS works?
1. QuEChERS extraction method is designed for
multi-residue pesticide analysis of fruits and vegetables with high
water content (80%-95%). Some compounds will interfere the detection of
target pesticide, such as chlorophyll, fatty acid, pigment, which could
be removed by QuEChERS.
2. Some QuEChERS methods add buffers during
the extraction step. Two most common methods are the European Committee
for Standardization (EN 15662) method which applies citrate buffer for
extraction and the Association of Analytical Communities (AOAC 2007.01)
method using acetic acid buffer.
3. For low-water content fruits and
vegetables, additional water needs to be added to optimize the
extraction. For high-fatty content fruits and vegetables, C18E should be
added to remove it. For high-pigment content fruits and vegetables,
graphicarb should be added. |
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Order No. |
Description |
Specifications |
Packing
|
|
1981-5550 |
Extraction Kits, 4g MgSO4,
1.5g Na Acetate |
50ml |
25pcs/box |
|
AOAC 2007.01 Method |
|
1981-5755 |
Acetic Extraction Tube: 6g
MgSO4, 1.5g Na Acetate |
50ml |
25pcs/box |
|
1981-5022 |
PSA Clean-up tube1: 50mg
PSA, 150mg MgSO4 |
2ml(1ml sample) |
100pcs/box |
|
1981-5058 |
PSA Clean-up tube2: 400mg
PSA, 1200mg MgSO4 |
15ml(8ml sample) |
50pcs/box |
|
1981-5122 |
PSA/C18 Clean-up tube:
50mg PSA, 50mg C18, 150mgMgSO4 |
2ml(1ml sample) |
100pcs/box |
|
1981-5158 |
PSA/C18 Clean-up tube2:
400mg PSA, 400mg C18, 1200mg MgSO4 |
15ml(8ml sample) |
50pcs/box |
|
1981-5258 |
PSA/C18GCB Clean-up
tubel1: 50mg PSA, 50mg C18, 50mg GCB |
2ml(1ml sample) |
100pcs/box |
| |
150mg MgSO4 |
|
|
|
1981-5456 |
PSA/C18/GCB Clean-up
tube2: 400mg PSA, 400mg C18, 400mg GCB, 1200mg MgSO4 |
15mL(8ml sample) |
50pcs/box |
|
1981-4950 |
Disperzive kits, 50mg PSA,
150mg C18EC, 900mg Na2SO4 |
15ml(8ml sample) |
50pcs/box |
|
1981-0029 |
Disperzive kits All food
types, 400mg PSA, 45mg GCB, 1200mg MgSO4 |
15ml(8ml sample) |
50pcs/box |
|
EN 15662
Method |
| |
|
|
25pcs/box |
|
1981-5650 |
Citric acid tube:4g MgSO4,
1g NaC1, 0.5g Na-Citrate sesquihydrate, 1g Na-Citrate |
50ml |
25pcs/box |
|
1981-5021 |
PSA Clean-up tube1: 25mg
PSA, 150mg MgSO4 |
2ml(1ml sample) |
100pcs/box |
|
1981-5056 |
PSA Clean-up tube2: 150mg
PSA, 900mg MgSO4 |
15ml(6ml sample) |
50pcs/box |
|
1981-5256 |
PSA/GCB Clean-up tubel:
150mg PSA, 15mg GCB, 900mg MgSO4 |
15ml(6ml sample) |
50pcs/box |
|
1981-5356 |
PSA/GCB Clean-up tube2:
150mg PSA, 45mg GCB, 900mg MgSO4 |
15ml(6ml sample) |
50pcs/box |
|
1981-5121 |
PSA/C18 Clean-up tube1:
25mg PSA, 25mg C18 |
2ml(1ml sample) |
100pcs/box |
| |
150mg MgSO4 |
|
|
|
1981-5156 |
PSA/C18 Clean-up tube2:
150mg PSA, 150mg C18, 900mg MgSO4 |
15ml(6ml sample) |
50pcs/box |
