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Determination of Phenazine-1-carboxylic Acid by HPLC-DAD and HPLC-ESI-MS/MS:A Comparison of the Two Methods

LIU Yu,FENG Yi-zhi,LIU Wei(Shandong Pesticide Research Institute,Jinan 250033,China)  
[Aims]To select an analytical method for determining phenazine-1-carboxylic acid residues in wheat,seedling/straw and soil.[Methods]The sample was extracted and purified,followed by DAD detector and HPLC-MS/MS analysis,respectively.[Results]The results showed the average recoveries of phenazine-1-carboxylic acid were 80.3-95.8% in wheat,71.7-94.9% in seeding/straw and 77.2-101.1% in soil,with relative standard deviations were 1.59-8.03%,1.74-8.40% and 1.29-8.55%,respectively.The limits of quantification(LOQ) of HPLC-DAD and HPLC-ESI-MS/MS in wheat,seedling/straw and soil were 0.01,0.05,0.005 mg/kg and 0.005,0.01,0.005 mg/kg,respectively.[Conclusions]Comparison of the two methods,HPLC-ESI-MS/MS was sample,high sensitivity and appropriate for determining phenazine-1-carboxylic acid residue from field samples.
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