An assay procedure to compare sorptive capacities of activated carbon dressings: the detection of impregnation with silver.
A semiquantitative assay procedure for the estimation of uptake of diethylamine by activated carbon dressings has been developed. The procedure involves the use of Nessler's reagent as a comparative indicator. The use of diethylamine allows the concomitant detection of silver with which the dressings may be impregnated. The implications of silver/amine complex formation during dressing use are discussed. Quantification of the silver content of one such fabric was carried out by atomic absorption spectrophotometry. A silver content of 2770 ppm was found. It is suggested that this method might be suitable for adoption as the basis for a pharmacopoeial assay procedure for activated carbon dressings.
Schmidt
R J
RJ
Surgical Dressings Research Unit, Welsh School of Pharmacy, Cardiff, UK.
Shrestha
T
T
Turner
T D
TD
D000327:Adsorption; D001458:Bandages; D002244:Carbon; D002606:Charcoal; D004048:Diethylamines; D007202:Indicators and Reagents; D012834:Silver / Q000032:analysis*; D013054:Spectrophotometry, Atomic
D004048:Diethylamines; D007202:Indicators and Reagents; D002606:Charcoal; D012834:Silver; D002244:Carbon