• Application Note

Paraquat and Diquat in Tap Water

Paraquat and Diquat in Tap Water
  • Waters Corporation

This is an Application Brief and does not contain a detailed Experimental section.

Abstract

This application brief highlights the analysis of paraquat and diquat in tap water. 

Introduction

Paraquat and diquat are quaternary ammonium herbicides used in great quantities worldwide for defoliation and weed control (see Figure 1). In the United States alone, paraquat use was 4 million pounds and diquat use was 20,000 pounds in 2002. Because these compounds are potentially toxic to wildlife and to humans, water samples are monitored to assure that residue levels meet safety standards.

Experimental

HPLC Method

Column:

Symmetry C18, 3.9 x 150 mm, 5 μm (p/n: WAT046980)

Mobile phase:

25 mM Octanesulfonate, pH 3.0/methanol 45:55

Flow rate:

0.75 mL/min

Injection volume:

80 μL

Sample:

200 mL spiked tap water processed on Oasis MCX cartridge

Detection:

UV @ 227 nm

Results and Discussion

Featured Products

WA31763.120, June 2003

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