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Capillary electrophoresis using SDS in phosphate buffer provides high resolution and short separation time for peptide and protein hydrolysate amino acids after derivatization with phenylisothiocyanate. The phenylthiocarbamyl derivatives are quantified in the picomole and femtomole range at signal-to-noise ratios better than 3:1 (for 50 fmol) and with a linearity correlation coefficient averaging...
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