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Citation: DU Xia-Yu, XIONG Yan-Mei, XIA Jing-Jing, MIN Shun-Geng. Rapid Quantification of Fipronil in Solid Agrochemicals of Acetamiprid by Attenuated Total Reflectance Infrared Spectroscopy[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(4): 543-550. doi: 10.19756/j.issn.0253-3820.191627 shu

Rapid Quantification of Fipronil in Solid Agrochemicals of Acetamiprid by Attenuated Total Reflectance Infrared Spectroscopy

College of Science, China Agricultural University, Beijing 100193, China

Received Date: 24 October 2019
Revised Date: 7 February 2020

A method for rapid determination of the content of fipronil in the solid preparation of acetamiprid based on attenuated total reflection Fourier transform infrared spectroscopy (ATR-FT-IR) was developed. Fourier transform infrared spectrometer was used to collect the spectra of 69 solid samples and their extraction samples. The effects of different pretreatment methods and variable selection methods on the spectra of the samples were explored. The sample set was divided by the Kennard-Stone algorithm. A quantitative model was established and optimized by partial least squares. Separate validation sets were used to evaluate the models. The predicted regression coefficient of the fipronil quantitative model of solid samples was 0.9762, and the root mean square error of prediction set (RMSEP) was 0.0022. The predicted regression coefficient of the fipronil quantitative model of dimethylformamide (DMF) extraction was 0.9810, and the RMSEP was 0.0019. When the fipronil contents were 0.60%-5.00%, the predicted mean relative error (MRE) of the external test sample was 0.08. This method can be applied to the rapid detection of banned pesticides in addition to fipronil.
- Attenuated total reflectance infrared spectroscopy,
- Partial least square,
- Variable selection,
- Fipronil,
- Acetamiprid
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