RECOMBINANT HUMAN INSULIN .6. DETERMINATION OF RECOMBINANT HUMAN PROINSULIN BY CAPILLARY ZONE ELECTROPHORESIS - OPTIMIZATION OF EFFICIENCY AND SELECTIVITY
Dm. Koulich et al., RECOMBINANT HUMAN INSULIN .6. DETERMINATION OF RECOMBINANT HUMAN PROINSULIN BY CAPILLARY ZONE ELECTROPHORESIS - OPTIMIZATION OF EFFICIENCY AND SELECTIVITY, Journal of chromatography B. Biomedical applications, 662(2), 1994, pp. 357-362
Citations number
19
Categorie Soggetti
Chemistry Analytical
Journal title
Journal of chromatography B. Biomedical applications
The optimization of the separation of recombinant human insulin (rhI)
and recombinant human proinsulin (rhP) by free-solution capillary zone
electrophoresis in uncoated fused-silica capillaries with ionic and z
witterionic buffers was carried out. The relationship between the sele
ctivity and pH of the buffer was established. The effects of pH and io
nic strength of the buffer on protein adsorption on the capillary wall
s and Taylor diffusion was investigated. The separation of rhI and rhP
with an efficiency of 200000 theoretical plates was achieved using 20
mM Na2HPO4-NaOH buffer (pH 11.2). The proposed method allows the simu
ltaneously determination of rhP and some rhI degradation products (whi
ch are also included in pharmacopoeias) in pharmacopoeially limited am
ounts in rhI.