Recent content by vanadium

  1. V

    Adding a biocide to guarantee sterility ? any idea ?

    Hi, I have some problem of sterility when I use filtration units. I think there are some bacteria inside despite the presence of benzyl alcohol. After the vial are capped, they are heated at 130°C for 1h but some steroid such as trenbolone cannot be heated. Benzyl alcohol does not seem to be...
  2. V

    Questions about the choice of the syringe filter

    Hi, I sometime prepare steroid solution (10 ml vials) but I have a problem concerning the syringe filter. I presently use whatman .45 um (diameter 25 mm) PVDF syringe filter but there are too slow in my opinion and PVDF membrane are know to not be really fast. I would like to use .22 um to...
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