“…The deviation from the reference pK a of 8.77 was attributed to a disturbance of the dissociation behavior of the phenylboronic acid due to being immobilised onto a polymer surface. 12, 13 Here the titration of APBA in free solution resulted in a pK a of 8.9 (Fig. 3(b)), which is in good agreement with litrature values.…”
The use of on-column capacitively coupled contactless conductivity detection for the accurate non-invasive visualisation of the pH dependence of covalently bound boronic acid groups within a monolithic polymeric capillary column is demonstrated.
“…The deviation from the reference pK a of 8.77 was attributed to a disturbance of the dissociation behavior of the phenylboronic acid due to being immobilised onto a polymer surface. 12, 13 Here the titration of APBA in free solution resulted in a pK a of 8.9 (Fig. 3(b)), which is in good agreement with litrature values.…”
The use of on-column capacitively coupled contactless conductivity detection for the accurate non-invasive visualisation of the pH dependence of covalently bound boronic acid groups within a monolithic polymeric capillary column is demonstrated.
“…These (342) Vol.14 Supplement (2003) behaviors correspond to those of the adsorption of saccharides on boronate-bearing resins. [9,10] This leads to the conclusion that the saccharides with two or more cis-diol groups might be better for extraction. The extents of extraction for Glc, Gal and Fm are listed in Table 1.…”
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