Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1243999 | Talanta | 2007 | 8 Pages |
The direct determination of mancozeb in agrochemicals has been made by diamond attenuated total reflectance (ATR) Fourier transform infrared spectroscopy in the middle range (DATR-MIR) and diffuse reflectance infrared Fourier transform spectroscopy in the near range (DR-NIR) methods using in both cases a previous identification of the samples using a dendrographic classification and an appropriate partial least squares (PLS) calibration established from a set of nine external standards and optimized for each type of sample. It was analyzed a heterogeneous population of 11 samples obtained from the Spanish market, containing different co-formulated products, such as fosetyl-Al, copper oxychloride, metalaxyl or cymoxanil. High performance liquid chromatography (HPLC) was used as reference method for validation of both vibrational strategies. The close agreement between values found for both, DATR-MIR and DR-NIR methods, and reference HPLC values indicates the accuracy and reliability of the proposed techniques for the direct determination of mancozeb in commercially available formulations.