Quantitative determination of αs2- and αs1-casein in goatʹs milk with different genotypes by capillary electrophoresis

A capillary electrophoresis (CE) method has been applied for the quantitative determination of αs1- and αs2-CN in goatʹs milk. Several analytical parameters were evaluated showing the reliability of this CE method. Coefficients of determination (R2) greater than 99% were obtained and determination limits of 1.23 and 0.98 mg/ml were achieved for αs1- and αs2-CN, respectively. The analytical parameters studied in terms of accuracy, precision and recovery were within acceptable limits. Among 18 samples of 4 different genotypes (BB, EE, BF and FF) for αs1-CN were analysed, different amounts were obtained from the genotypes.