Dear,
I'm trying a sterility test of antibiotic (oxytetracycline). This formulation has oxytetracicylne 217mg/mL + formaldehyde
sodium (2.2mg/mL). I'm using Membrane Filter Method with Fluid (1g/L Peptone + Tween in differents concentrations ex: 7g/L; 1g/L to wash teh membrane), but it isn't comparable with the positive controle. Wil you suggest another neutralizer?
Sorry my English, I'm learning!!
Best regards,
Laboratórios TASQA Sheila Vilas Boas Fraga
Depto. de Biologia
Laboratórios TASQA
Tel: +55 19 3874-3710
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