Abstract
Abstract Performance of the type-XLL cross-axis coil planet centrifuge with three different size of the multilayer coils was evaluated by separating dipeptide samples on a polar biphasic solvent composed of n-butanol/acetic acid/water (4:1:5, v/v/v). Best results were obtained from the large helical diameter coils with β values of 1.00-1.20 [1]| by eluting with the upper nonaqueous phase at 120 ml/h. The four dipeptides. L.-tryptophyl-L-tyrosine, L-leucyl-L-tyrosine, L-valyl-L-tyrosine and L-tyrosylglycine were completely rcsolved in 9 hours with high peak resolution (Rs > 1.5).
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