RT Journal Article
SR Electronic
T1 A New Type of Positively Charged Filter: Preliminary Test Results
JF PDA Journal of Pharmaceutical Science and Technology
JO PDA J Pharm Sci Technol
FD Parenteral Drug Association (PDA)
SP 69
OP 75
VO 39
IS 2
A1 Carazzone, Marilena
A1 Arecco, Domenico
A1 Fava, Mario
A1 Sancin, Paolo
YR 1985
UL http://journal.pda.org/content/39/2/69.abstract
AB A new type of positively charged filter media was investigated to find out if they were able to retain substances having opposite electrical charges present in solutions of different composition. In addition retention stability and the influence of different operational procedures on the efficiency of the retention was also explored. Two groups of trials were performed, the first group with bacterial endotoxins and the second with bacterial suspensions. The results showed that retention efficiency changed according to operational procedures and composition of the solution. Good efficiency was observed when negatively charged substances were present in distilled water, but did not occur in aqueous solutions containing electrolytes. Positively charged filter media are very interesting, but need careful preliminary studies in order to define their suitability and operational procedures.