Whatman... .20 or .45 ?

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Thanks for the info. I just wish it didn't take so damn long to filter through a .20. I like to let whatever I make sit for at least two weeks before using it. So far it seems to be doing the trick as I haven't had any problems to note.

Is it?hard to belive

 

[pumpedpittbullpower]

well if u want sterile use .22 micron filter.

also the ba and bb have NOTHING to do with sterile solution. It suspends the chemical in the oil and thats all it does.

Also the syringe filter and too much work. heating oil will ruin the membrane and certain temps.

Just use a stericup filter .22 in a glass bottle .

 

[justinjones1963]

I guess I'll add my 2 cc's

I have decided to double filter. The initial batch is usually around 50ml so I use a .45 for that. I let the stuff sit a few weeks and then when I am ready to pump out the individual 10ml vials I use for a cucle I use a .2u

Better safe than sorry.

 

[anal itch]

hey anal itch,u mentioned race bikes?????u talking street or dirt??

damn, haven't been here in a looooong time. I race street bikes on road courses like VIR, Road Atlanta, Barber, Daytona (with the infield), etc. That's what's kept me away from here all summer. I should be back around now as we only have one race weekend left for the season.

 

[interleukin 1]

.2 micron is the Chemistry / Biopharm standard for sterility. Yes, it is true .45micron is faster to filter you "science experiments" and chances are it get most of the "stuff"..But there are worse things found in your kitchen that are a lot worse then bacteria and these types of pathogens are usually way smaller. Mycobacteria and virusus make common bacteria look like Ron Jeramy's crank....so they will pass through the .45 pore size with ease.
Stick with the .2 micron....have a little patients!
If filter time is that bad for you, maybe invest in a filter pump from a lab supply company website. ....and I do not mean GPZ!

 

[glover]

You really have to use the .45 for any oil based gear. The 0.2 is for water based like winny.

 

[jagerbombme]

i was using and changed to .2 for the reasons stated that there are particles smaller than .45 not many i've heard, a few viral and bacteria. however i heard ba will possibly kill the bacteria, but if the dead bacteria are small enough, they'll still pass through the .45 and now theres a whole separate debate on whether injecting dead bacteria in you makes your body respond to it in a similair manner as antibiotics?

 

[ALIN]

What are you guys using? I've used both and hate how much longer it takes with the .20 Is it really necessary to use the finer filter?

.20 will take you some time to pass thru.

 

[BigBastard]

How much can you pass through a .20 filter if you use unsteril grapeseed oil från the grossery shop before you need to change to a new filter?

 

[Pikaberdot]

.45 was always fine for me.