Immersion plating, definition

Gas oxygen electrodes [Pt(02) being the most widely used] are often exploited for the investigations of oxide-ion chemistry in most nitrate, chloride and sulphate melts. The construction of this kind of electrode is simple enough [62] they are made of a noble (or in a more general case, inconsumable) metal plate (Au, Pt, Ag, Pd), placed in an atmosphere with a definite, known constant partial pressure of 02 and partially immersed in the studied melt containing oxide ions. 

Amino acid chromatograms have been preserved by impregnation with collodion to which a definite amount of glycerol had been added [42, 66]. Chromatograms have also been pasted over with self-adhesive plastic film and the layer subsequently peeled off the plate [354]. Spraying with polymer dispersions (polyacrylates, polyvinylidene chloride or polyvinyl propionate) is usually more suitable [402]. Such aerosols are commercially available (Firms 88, 153). Mention may be made also of impregnation of layers by immersion in solutions of polymers although this has a restricted application (Firm 60). 

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