High performance liquid chromatographic detemination of maleic hydrazide residue in potatoes


A reliable and fast method was developed using high performance liquid chromatography equipped with a fluorescence detector for separating and quantifying the residues of maleic hydrazide in potatoes. The method started with methanol extraction, followed by filtration or centrifugation, and concentration to dryness. The remaining was reconstituted with water for cleanup, which was applied to a SCX solid phase extraction cartridge (a strong cation exchanger). Average recoveries of potatoes spiked with 10-20 ppm maleic hydrazide were in the range of 87.8∼95.7%, and their coefficients of variation were in the range of 2.1∼4.0%. The limit of detection was 0.5 ppm.

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