QuEChERS(sounds like "Catchers") is the abbreviation describing its features of quick, easy, cheap, effective, rugged and safe.
This method was first developed by Department of Agriculture M. Anastassisdes et al. (2003) in U.S. Finally, QuEChERS method was formally proposed after multiple verification and improvement.
The QuEChERS method is a residue detection method for multiple target objects in the analysis of pesticide residues in the matrix with high water content (80-95%). It is the fast version of SPE with the similar cleaning effect, but its treatment steps are more concise. QuEChERS method has the characteristics of time saving, high efficiency and economical. There may be a large number of chlorophyll, lipid, steroid and other compounds in sample matrix of food, animal products and so on. These extracts can seriously interfere with the analysis of target substance, while QuEChERS method can effectively reduce these problems. With a few simple steps. it can complete the preparation of pesticide residues and other samples. Nowadays, this method has been widely accepted worldwide, if it is applied to your project, you will find that it can significantly reduce the time required for method development and pretreatment.
Comparative Advantage
Reasons for Choosing Welchrom QuEChERS Products
- Time saving: Pre-packed products save valuable time for pretreatment, enabling smooth high-throughput analysis.
- Economical: As the professional chromatographic packing materials manufacturer, we offer preferential price by bulk purchasing of our reagents.
- Durable: ultra-clean SPE adsorbent and strict quality control to ensure reproducibility of results. Anhydrous magnesium sulfate is treated by muff furnace at high temperature to improve the dehydrating effect and remove contaminants that may be introduced in the self-made process.
- Customized: We provide customized service according to the needs of users, and professional technical services of our technical team.
- Humanized packaging: The extraction bag is packaged by coffee bag, and the clean-up tube is packaged by vertical pipe rack, which is very convenient to use.
Development Course of QuEChERS Method
Step 1 --- Extraction
Nowadays, QuEChERS method has been applied in more and more fields, such as detection of PAHs in meat products, detection of various veterinary drug residues, detection of dicyandiamide, etc. The development of these applications has greatly reduced the pretreatment workload of chromatographers.
Common Questions for QuEChERS Method
Q: How to improve recovery rate of method?- Using high-quality homogeneous device can obtain smaller sample particles and improve the precision of the method.
- Using matrix solution to prepare standard solution can reduce matrix effect and obtain higher accuracy.
- The addition of isotopic internal standard can effectively monitor the recovery rate.
- Making the water content of the sample to be tested reach 80% can effectively improve the extraction efficiency.
- Alkali sensitive pesticides can be added with buffer salt, extraction and extraction bags to prevent loss.
- According to the thermal stability of pesticides, appropriate analytical means should be adopted. GC or GC/MS can be used for general pesticides, while LC/MS/MS can be used for thermal unstable pesticides.
- Toluene is added to the final sample solution to prevent thermal instability in the GC liner.
- Adding 1% formic acid to the final sample solution can reduce the degradation loss of alkali sensitive compounds.
Q: Questions of chromatography
- Adding acetic acid will affect the cleaning effect of PSA adsorbent and leading peak, tailing peak may occur in GC chromatogram. If this happens, a QuEChERS method without acetic acid can be used instead.
- For some samples of complex matrices, if the QuEChERS method cannot effectively purify the samples, multiple methods such as SPE-QuEChERS and QuEChERS-GPC can be used.
Brand: Welchrom
Barrel Size: 2mL
MgSO4 Weight:
Na Acetate Weight:
Na Citrate Weight:
Na Citrate Sesquihtdrate Weight:
NaCl Weight:
PSA Weight: 50mg
C18E Weight: 50mg
GCB Weight:
Na2SO4 Weight:
C18 Weight:
QuEChERS(sounds like "Catchers") is the abbreviation describing its features of quick, easy, cheap, effective, rugged and safe.
This method was first developed by Department of Agriculture M. Anastassisdes et al. (2003) in U.S. Finally, QuEChERS method was formally proposed after multiple verification and improvement.
The QuEChERS method is a residue detection method for multiple target objects in the analysis of pesticide residues in the matrix with high water content (80-95%). It is the fast version of SPE with the similar cleaning effect, but its treatment steps are more concise. QuEChERS method has the characteristics of time saving, high efficiency and economical. There may be a large number of chlorophyll, lipid, steroid and other compounds in sample matrix of food, animal products and so on. These extracts can seriously interfere with the analysis of target substance, while QuEChERS method can effectively reduce these problems. With a few simple steps. it can complete the preparation of pesticide residues and other samples. Nowadays, this method has been widely accepted worldwide, if it is applied to your project, you will find that it can significantly reduce the time required for method development and pretreatment.
Comparative Advantage
Reasons for Choosing Welchrom QuEChERS Products
- Time saving: Pre-packed products save valuable time for pretreatment, enabling smooth high-throughput analysis.
- Economical: As the professional chromatographic packing materials manufacturer, we offer preferential price by bulk purchasing of our reagents.
- Durable: ultra-clean SPE adsorbent and strict quality control to ensure reproducibility of results. Anhydrous magnesium sulfate is treated by muff furnace at high temperature to improve the dehydrating effect and remove contaminants that may be introduced in the self-made process.
- Customized: We provide customized service according to the needs of users, and professional technical services of our technical team.
- Humanized packaging: The extraction bag is packaged by coffee bag, and the clean-up tube is packaged by vertical pipe rack, which is very convenient to use.
Development Course of QuEChERS Method
Step 1 --- Extraction
Nowadays, QuEChERS method has been applied in more and more fields, such as detection of PAHs in meat products, detection of various veterinary drug residues, detection of dicyandiamide, etc. The development of these applications has greatly reduced the pretreatment workload of chromatographers.
Common Questions for QuEChERS Method
Q: How to improve recovery rate of method?- Using high-quality homogeneous device can obtain smaller sample particles and improve the precision of the method.
- Using matrix solution to prepare standard solution can reduce matrix effect and obtain higher accuracy.
- The addition of isotopic internal standard can effectively monitor the recovery rate.
- Making the water content of the sample to be tested reach 80% can effectively improve the extraction efficiency.
- Alkali sensitive pesticides can be added with buffer salt, extraction and extraction bags to prevent loss.
- According to the thermal stability of pesticides, appropriate analytical means should be adopted. GC or GC/MS can be used for general pesticides, while LC/MS/MS can be used for thermal unstable pesticides.
- Toluene is added to the final sample solution to prevent thermal instability in the GC liner.
- Adding 1% formic acid to the final sample solution can reduce the degradation loss of alkali sensitive compounds.
Q: Questions of chromatography
- Adding acetic acid will affect the cleaning effect of PSA adsorbent and leading peak, tailing peak may occur in GC chromatogram. If this happens, a QuEChERS method without acetic acid can be used instead.
- For some samples of complex matrices, if the QuEChERS method cannot effectively purify the samples, multiple methods such as SPE-QuEChERS and QuEChERS-GPC can be used.
Brand: Welchrom
Barrel Size: 2mL
MgSO4 Weight:
Na Acetate Weight:
Na Citrate Weight:
Na Citrate Sesquihtdrate Weight:
NaCl Weight:
PSA Weight: 50mg
C18E Weight: 50mg
GCB Weight:
Na2SO4 Weight:
C18 Weight: