Melamine contamination in milk powder in Uruguay |
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| Authors: | Víctor Alonso García Londoño Martín Puñales Marcela Reynoso Silvia Resnik |
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| Affiliation: | 1. Facultad de Ciencias Exactas y Naturales, Departamento Química Orgánica e Industrias, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina;2. Fundación de Investigaciones Científicas Teresa Benedictina de la Cruz, Luján, Buenos Aires, Argentina;3. Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina, Ciudad Autónoma de Buenos Aires, Argentina;4. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, La Plata, Argentina |
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| Abstract: | Forty samples of milk powder purchased in Uruguay were analysed to assess melamine (MEL) levels. Trichloroacetic acid and acetonitrile were used to extract and precipitate milk proteins previously to clean up of the samples by solid-phase extraction and then were determined by liquid chromatography coupled to ultraviolet detection. The limit of detection (LOD) and limit of quantification (LOQ)of MEL were 0.006 and 0.019 mg kg?1, respectively. Milk was fortified with MEL at three levels, producing average recoveries higher than 83.8%. The values for positive samples ranged from 0.017 to 0.082 mg kg?1. Nine samples were positive. Three of them had concentrations between LOD and LOQ. The mean MEL contamination was 0.028 mg kg?1. Consumption of milk powder containing these levels of MEL does not constitute a health risk for consumers. |
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| Keywords: | Melamine milk powder HPLC |
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