4.7 Article

Determination of halosulfuron-methyl herbicide in sugarcane juice and tomato by capillary electrophoresis-tandem mass spectrometry

Journal

FOOD CHEMISTRY
Volume 175, Issue -, Pages 82-84

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.11.137

Keywords

Capillary electrophoresis; Tandem mass spectrometry; Halosulfuron-methyl; QuEChERS; Sugarcane; Tomato

Funding

  1. FAPESP [2012/06642-1, 2011/02156-2, 2013/14993-1]
  2. CNPq [304239/2010-0]
  3. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [11/02156-2] Funding Source: FAPESP

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A capillary electrophoresis-tandem mass spectrometry (CE-MS/MS) method for the determination of halosulfuron-methyl (HSU) residue in samples of sugarcane juice and tomato is introduced and validated. The samples were submitted to a QuEChERS extraction procedure followed by electrophoretic separation in NH4HCO3 electrolyte (adjusted to pH 8.5) and detection by electrospray-tandem mass spectrometry. The total HSU migration took place in less than 3.5 min, and the detection was accomplished by monitoring three fragmentation processes of this anion: m/z 435-182, 139, and 83. The R-2 values for concentrations up to 100 ppb (mu g kg(-1)) were, respectively, 0.992, 0.992, and 0.978. Recovery values for samples spiked at three concentration levels (10, 20 and 50 ppb) were in the range of 96-104% with standard deviation not greater than 5.0%. The limit of detection for HSU in sugarcane juice and tomato was 2 ppb for both samples. (C) 2014 Elsevier Ltd. All rights reserved.

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