| CPC G01N 27/44726 (2013.01) [G01N 27/44791 (2013.01)] | 24 Claims |
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1. An aqueous microchip capillary electrophoresis sample buffer for a protein drug sample, the buffer comprising:
155 to 200 mM 2-iodoacetamide;
0.50 to 1.5% lithium dodecyl sulfate; and
60 to 95 mM sodium phosphate,
wherein the aqueous microchip capillary electrophoresis sample buffer has a pH of less than or equal to 8, and wherein microchip capillary electrophoresis is used to identify contaminants in the protein drug sample.
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