Chemiluminescence method based on KIO 4 -K 2 CO 3 -Mn 2+ reaction for rapid and sensitive determination of forchlorfenuron in dried fruit.

Forchlorfenuron is a low-toxic phenylurea plant growth regulator. Excessive intake of forchlorfenuron can lead to metabolic disorders of the matrix and harmful to human health. The chemiluminescence intensity of the KIO 4 -K 2 CO 3 -Mn 2+ reaction was decreased in the presence of forchlorfenuron. Based on it, a rapid and sensitive chemiluminescence method was established for the determination of forchlorfenuron by combining with the batch injection static device. The injection speed, injection volume and the reagent concentration of the forchlorfenuron-KIO 4 -K 2 CO 3 -Mn 2+ chemiluminescence reaction were optimized. Under the optimized conditions, the linear range of the method was 1.0-200.0 μg/L, and the limit of detection was 0.29 μg/L (S/N=3). The chemiluminescence method for the determination of forchlorfenuron can be completed in 10 s. The method was applied to detect the residual forchlorfenuron in dried fruit samples, and the results are consistent with high-performance liquid chromatography mass spectrometry. This method had the advantages of high sensitivity, rapid response, less reagent consumption and convenient operation. It will provide new perspective to the chemiluminescence for rapid and sensitive determination of forchlorfenuron in various complex samples.