DETERMINATION OF AMINO AND SILANOL FUNCTIONAL-GROUPS ON GLASS VIA CHEMICAL DERIVATIZATION AND ESCA

The ESCA analysis of surface silanol (Si‐OH) and amino (NH2) functional groups on glass is either not possible or very ambiguous. These functional groups can be identified positively by using chemical derivatization in conjunction with ESCA. In addition to specificity, the technique also offers a significant decrease in detection limit. The NH2 was derivatized using penta‐fluorobenzaldehyde (PFB) and the Si‐OH was silylated with tridecafluoro‐1,1,2,2‐tetrahydrooctyl‐1‐trichloro‐ silane (TDFS). Quantification of the NH2 group can be accomplished with PFB derivatization. Only a relative comparison of the silanol group on glass can be carried out in TDFS silylation owing to the uncertainty in the completion of this reaction in the ESCA sampling depth. Copyright © 1990 John Wiley & Sons Ltd.