United Science specializes in pesticide testing services and has extensive experience in GC/MS testing of pesticides in a variety of  matrices including food, soils and water.

Pesticides are a vital part of the agriculture industry, assisting growers in meeting world food demands. However, due to negative impacts on human and animal health as well as ecological effects of pesticides and contaminants, it is not desirable to find residues of those chemicals pesticides in food or feed after it is harvested and headed for human or animal consumption.

To determine whether crop, vegetable, or soil contamination has occurred, you need pesticide residues analysis. Using the most advanced technologies, United Science can identify and quantify the individual compounds of more than 300 pesticides.

Pesticide residues can be defined in two ways:

  • Pesticide residues are the miniscule amounts of pesticide remaining in a crop after harvesting.
  • Degradation products that the pesticide changes into within the crop.

Our residues analysis methods, which cater for both definitions, include the use of liquid chromatography with tandem mass spectrometry (LC MS/MS) and gas chromatography mass spectrometry (GC/MS).

United Science has the equipment and experience to service your complete food and feed testing needs.  Our trained scientists and technicians hold Ph.D.  in analytical chemistry and are laboratory experienced.

Using our services ensures that your food stuffs satisfy the world’s regulatory requirements for the levels of pesticide residues. Should you like to discuss how our Pesticide Residue Testing can help your organization, kindly complete the form and one of our experts will contact you to provide more information.

Accurate and Reliable Testing

Regulations have been set by many countries on the maximum residue levels (MRLs) allowed for pesticides in foods, food products and feeds. Typical residue limits range from 0.01-0.5 mg/kg. SGS utilizes specialized equipment including LC-MSMS (Liquid Chromatography with Tandem Mass Spectrometry) and GC-MS (Gas Chromatography with Mass Spectrometry) to screen for more than 300 pesticides. These instruments allow us to identify the pesticides present at levels 10 to 100 times lower than regulated limits.

Pesticide Residue

United Science pesticide residue services include testing for insecticides, herbicides, and fungicides in the following classes:

  • Acetamides
  • Carbamates
  • Dicarboximides
  • Imidazolinones
  • Nicotinoids
  • Organochlorines
  • Organonitrogens
  • Organophosphates
  • Phenoxy acid herbicides
  • Phenylurea herbicides
  • Pyrethroids
  • Triazines
  • Triazoles


Melamine and  veterinary drug residues such as antibiotics, and hormones may be concentrated in products after processing. These contaminants may harm animals and humans in concentrated levels. Testing of specific contaminants need to be identified for analysis. These contaminants may be determined with use of the LC MS/MS or GC/MS.

United Science offers many more contaminant tests to suit your needs. Please contact us for more information regarding tests not listed here.