Fast Analysis of Phenoxyacetic and Phenoxypropionic Herbicides in Vegetable Matrix by Negative Ion Electrospray LC/MS/MS

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Introduction
Phenoxy acids are used as herbicides in agricultural and domestic areas. These compounds have to be detected at
trace level to ensure a safe drinking water and food supply and verify appropriate remediation of these pollutants from
contaminated sites.

Among the analytical methods developed, LC/UV exhibits poor sensitivity and inadequate selectivity for complex vegetable matrices. Negative ion ESI LC/MS has exceptionally high sensitivity for these herbicides and, with the added selectivity of MS/MS, provides accurate analyses even for the most complex sample matrices.

A highly sensitive and fast method is described below for high throughput identification and quantitation four common
herbicides in vegetable extracts (Figure 1).

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