2020 Volume 69 Issue 3 Pages 141-150
In this study, LC-MS/MS analysis was carried out using ammonia solution as an eluent for pesticide residues. The detection sensitivity was compared with an ammonium acetate solution by the notification test method using the S/N ratio as an index. As a result, the detection sensitivity of most pesticide residues was improved by 3.9 times on average when using an ammonia solution. We considered that the electrospray of an ammonia solution is easier than that of an ammonium acetate solution as a reason for the improved detection sensitivity. Moreover, the matrix effect was the same as that of the notification test method as a result of confirming about carrot. LC-MS/MS analysis using an ammonia solution can be expected as a simple analytical method that enables high-sensitivity detection without the need for concentration operation in the analysis of pesticide residues.
