Recent content by phalaenopsis

When in a bind? That's mean in hard situation? And you are ok so that's good!

It depends. But coffe filters aren't. I don't mean sterility issue but contamination by fabric.

I read in some wise book that paper filters aren't suitable to filtration injectable solutions. During filtration little fabric pieces are detaching from the filter which can contaminate filtered solution.

Haha. Maybe I am too careful. I saw on TV mechanicians who checked pressure in engine cylinders with manometers to determine is it working right so it must be accurate way. Antoher thing is quality of manometer on your pump. So what do you suggest?Don't worry and heat solution to filter? I...

Re: Filtering sucks and kills my tumbs and finger. anyone use a caulkgun to help push You must buy underpressure pump. I saw pump with two modes - overpressure and underpressure. You can chose between -1 to 4 bar.

If I remember Milipore Steritop PVDF recommends max pressure 1bar(at) at 25*C(77*F) and maximal operating temp. 45*C(113*F) - max pressure not specified. So if you make 1bar underpressure and temp. 45*C I think filtration can be not effective. At higher temp. molecule oscillation will be higher...

What about testosterones? They are also full of fillers or they are pure like suppliers claim 99%?

I must misunderstand you. So when you wrote about autoclaving you had on your mind autoclaving only vials and rubberstops not final bottled product? Maybe you know degradating temperatures for different types of hormnes? Regards

It isn't so inconvinient as you think. In 8h with filtering you can make even 200 10ml vials of few types of gear. It's enough for few months. With autoclave you still have to wash and dry vials and filter with .45 filter to remove non-soluable compuunds. Also pharamcopea recommends for oil...

It's OK. You can put septa in 70% isoprophyl alcohol for 3h and dry it in cooling oven wrapped in aluminium foil or in bowl with cover and use dryied when you need.

Check my pos in thread Whatman... .20 or .45 ?

Take .22 syrgine filter and distilled water. Filter water and you get sterile water. If you want aqua per injectione take 900mg of salt and disolve it in 99,1g of distilled water next filter through .22 filter..

In my country where salary is low as in Africa whole gym collect cash and make gear for themsleve.

Ofcourse European and American firms producing wide range of chemicals including steroids exist but i don't know any which sell you hormones without permissions and licenses. China and other asian countries which have trade freedom remains solution.

Test E Crystals, mp 36-37.5°C. Lower melting point indicates lower quality. You can check melting point by taking two bowls. One little bigger and second smaller. Fill bigger bowl with slat and put in it smaller one that salt should sourround this smaller bowl. Put some small quantity of test to...