Quantification of Thiamethoxam in Rhizomes and Leaves of the Hedychium coronarium and Water and Soil by High-Pressure Liquid Chromatography


The linearity, stability, accuracy and inter-day precisions of the assay method were evaluated in water, soil and rhizomes and leaves of Hedychium coronarium of the Zingiberaceae family. Mato Grosso do Sul is a predominantly agricultural state in Brazil and has many rivers and permanent and seasonal lakes, in which the Hedychium coronarium, an aquatic plant, is found the swampy environments. The prepared samples were analyzed quantitatively by High Performance Liquid Chromatography with PDA and UV detection for the presence of thiamethoxam. The thiamethoxam was recovered from these samples at rates ranging from 81.16% - 99.93%. The coefficient of variation in the quantitative analysis of the thiamethoxam was under 5%. The linearity of the method was determined by linear regression. The analysis of the samples spiked with known amounts of analyte demonstrated that the response was proportional to the concentrations of the samples with determination coefficients of r2 = 0.9992 (water and soil) and r2 = 0.9990 (leaves and rhizomes) for the linear range of the analytical calibration curves of the samples. The detection limit was 0.36 μg.L-1 and quantification limit was 1.2 μg.L-1 for thiamethoxam. The method was considered sensitive for quantification of the thiamethoxam in water, soil and rhizomes and leaves of Hedychium coronarium.

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C. Gonçalves da Rocha, F. Henrique Ramos França and C. Andrea Lima Cardoso, "Quantification of Thiamethoxam in Rhizomes and Leaves of the Hedychium coronarium and Water and Soil by High-Pressure Liquid Chromatography," American Journal of Analytical Chemistry, Vol. 3 No. 3, 2012, pp. 242-249. doi: 10.4236/ajac.2012.33032.

Conflicts of Interest

The authors declare no conflicts of interest.


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