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  • Title: Liquid chromatographic determination of ethylenethiourea using pulsed amperometric detection.
    Author: Doerge DR, Yee AB.
    Journal: J Chromatogr; 1991 Nov 08; 586(1):158-60. PubMed ID: 1806552.
    Abstract:
    A liquid chromatographic method was developed using pulsed amperometric detection at a gold working electrode to measure residue levels of ethylenethiourea (ETU) in crops and groundwater. Use of the sequential pulsing program eliminates electrode fouling while preserving the sensitive and selective detection of ETU. Minimum detection limits in crops were 5-10 ppb (1.25-2.5 ng on-column) and 5 ppb (0.5 ng) in groundwater. The commercial availability of the pulsed electrochemical detector and its gold working electrode that remains functional with a minimum of conditioning is an improvement in method simplicity.
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