Dabsyl chloride derivatisation of melamine followed by high-performance liquid chromatography determination in water samples |
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Authors: | Mohammad Faraji Parisa Amini Kadijani |
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Institution: | 1. Faculty of Food Industry and Agriculture, Department of Food science &2. Technology, Standard Research Institute (SRI), Karaj, Iranmfaraji@standard.ac.ir;4. Central Research Laboratory, Tehran University of Medical sciences, Tehran, Iran |
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Abstract: | A new and sensitive precolumn derivatisation with dabsyl chloride was developed for the analysis of melamine in water samples by high-performance liquid chromatography (HPLC) with visible detection. Derivatisation with dabsyl chloride leads to improving sensitivity and hydrophobicity of melamine. Under optimum conditions of derivatisation and microextraction, the method yielded a linear calibration curve ranging from 10 to 2000 µg L?1 with a determination coefficient (R2) of 0.9952. Limit of detection (LOD) and limit of quantification (LOQ) were 2.0 and 6.0 µg L?1, respectively. The relative standard deviation per cent (RSD%) for intraday and inter-day extraction and determination at 20 and 200 µg L?1 levels of melamine was less than 8.2% (n = 6). Finally, the proposed method was successfully applied for the determination of melamine in different water samples and satisfactory results were obtained (relative recovery ≥91%). |
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Keywords: | Melamine dabsyl chloride high-performance liquid chromatography derivatisation |
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