How do we test for pesticides and solvents?

NB: The information on this page is no longer completely accurate. Curently we only use GC-MS both for pesticides and residues of solvents. For this reason, we can’t check your sample for every possible pesticide, although we do analyze your sample on a very broad selection of pesticides. The content of this page will be updated later.  

 

The two methods that we use to measure pesticides and residues of solvents are GC-MS-MS and LC-MS-MS. With these techniques we can very precisely determine the concentrations of these contaminants, even if they are only present in very small concentrations. We’ve decided to discuss GC-MS-MS and LC-MS-MS in separate articles, after reading these articles you will know how these methods works in practice and what information they provide us with.

 

What is chromatography?

Chromatography is a separation technique in which mixtures of substances are separated into their respective components. There are various types of chromatography, including gas chromatography, paper chromatography, and thin layer chromatography. The technique we choose depends on what we are trying to find out. For the identification of pesticides and residues of solvents a combination of GC-MS-MS and LC-MS-MS is superior. The results of chromatography are displayed in a chromatogram, a visual representation of the research. This chromatogram is similar to a simple graph. The peaks and patterns are indications for the presence of various components (in this case, pesticides and solvents).

 

Why GC-MS-MS and LC-MS-MS?

Why do we use two different kinds of chromatography for the measurement of pesticides and solvents, rather than simply relying on one of the two? If we only had to test for residues of solvents one of these two methods would indeed be sufficient. It’s the testing for pesticides that requires both these methods. There are many hundreds of pesticides which can be measured in a sample. Some of these pesticides are more easily found by GC-MS-MS, others better with LC-MS-MS. Because we want to offer our customers a complete picture of all possible contaminants, we use both techniques and combine the results.

 

Read the article on GC-MS-MS

 

Read the article on LC-MS-MS

 

Check out the list of pesticides that we can test your sample on: List of pesticides

 

NB: The information on this page is no longer completely accurate. Curently we only use GC-MS both for pesticides and residues of solvents. For this reason, we can’t check your sample for every possible pesticide, although we do analyze your sample on a very broad selection of pesticides. The content of this page will be updated later.  

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