Application of matrix solid-phase dispersion to the Propham (cas 122-42-9) and maleic hydrazide determination in potatoes by differential pulse voltammetry and HPLC
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Add time:09/25/2019 Source:sciencedirect.com
The application of the matrix solid-phase dispersion (MSPD) process as sample treatment in connection with the electrochemical detection is studied for the first time. For this purpose, a novel methodology is introduced for the extraction of Propham (cas 122-42-9) and maleic hydrazide herbicides from potatoes samples based in the MSPD process prior to their electrochemical detection. Potato samples disruption was done by blending them with C8 bonded-phase and selective herbicide extraction was achieved by successive treatment of the blended with 50 mM phosphate buffer pH 7.4 (for maleic hydrazide) and methanol (for propham). The extraction procedure efficiency was estimated using differential pulse voltammetry in potato samples spiked with the herbicides yielding recovery values of 98% and 68% for propham and maleic hydrazide, respectively. No significant adverse effect of the MSPD process was observed on the herbicides electrochemical signals. For comparison, recovery studies using HPLC with UV detection were carried out and a good correlation in the results obtained by using both techniques was observed.
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