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Determination of Diquat and Paraquat in Drinking Water - New Application Note

15 January 2020

This application note demonstrates the process used to extract diquat and paraquat from reagent water using the Biotage® Horizon 5000 extraction system in tandem with the ISOLUTE® C8(EC) 500 mg/6 mL solid phase extraction cartridge.

Diquat and paraquat are some of the most widely used and commercially available herbicides in the world. Both compounds are fast-acting, non-selective quaternary amines used primarily in the agricultural industries to control the penetration of invasive plants and increase crop yield. While these compounds have proven to be effective in herbicides, they also have been proven to be toxic to humans upon exposure. This toxicity and widespread availability has led to instances where individuals have issued fatal doses to humans. In turn, this has led to strict guidelines worldwide involving the use of diquat and paraquat in the agricultural community.



  • Diquat
  • Paraquat

 Download application note below.

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