Erlenmeyer Flask For Starters?

Australia & New Zealand Homebrewing Forum

Help Support Australia & New Zealand Homebrewing Forum:

SJW

As you must brew, so you must drink
Joined
10/3/04
Messages
3,401
Reaction score
211
I got my hands on two lab flasks the other day and I was thinking to reduce the chance of contamination I could boil my DME or LME in either this 1 litre Erlenmeyer flask (triangle type) or the 1 litre Volumentric (round ball type) flask then cool in cold water and add my Wyeast. Does anyone see any problems using this type of lab equip. to grow starters? One of the flasks is Pyrex and the other has some strange type of makings on it like, 10.10 from memory. But I did a test boil + quench and nothing went bang. Does anyone else use this method?


STEPHEN
 

mobrien

Stubborn Scientist Brewing
Joined
6/3/05
Messages
591
Reaction score
1
These type of flasks are great - BUT I would never ever ever in my long legged life use second hand lab equipment for food (or drink!) items - there are just too many nasties that I know can adhere to glass and it doesn't matter how much you wash, they will still be there.

Its up to you - but I wouldn't risk it.

2L spirit bottles such as for bulk sherry or port are just as good, and food safe...

My 2.2cents

Matt
 

Murray

Beer bear.
Joined
24/9/03
Messages
749
Reaction score
3
If they are second hand, passivate them with 1% nitric acid overnight, we used to do that where I used to work with success.

I probably wouldn't use that volumetric flask for boiling, but I use a 3L pyrex erlenmeyer flask for making starters.
 

Aaron

Well-Known Member
Joined
27/12/04
Messages
1,092
Reaction score
2
Can't see any problem. Don't know if I would boil in them then dunk them in the cold water. I know they are made pretty tough but why push them?

Personally I use the V8 juice bottles. They are nice reasonably thick glass bottles that reseal well. They come in 1l and 1.5l sizes. I just drill a hole in the lid insert a grommet and put in the air lock. Ideal for starters adn cheap too.
 

vlbaby

Beer Budda
Joined
21/9/04
Messages
560
Reaction score
0
I use the flasks all the time for my starters. Just cover the top with some aluminium foil and boil it up directly over the gas / electric whatever.
As soon as its finished boiling for 10-15 minutes dunk it straight into cold water. Trust me it wont shatter, I do it all the time.
This method is the most sanitary method of preparing a starter IMO , as it will sterilise the lid ( the foil ) the wort and the container in one hit.
I usually replace the foil with a rubber stop and air lock when its time to add the yeast, which i sterilize also. Boiling the rubber stop is good wayto do this , and i usually drop the air lock into some sanitise as it will melt if its boiled.

If its done properly, you can prepare a starter with absolute minimum risk of infection using these flasks.


vlbaby.
 

ausdb

Copper kettles don't kill people....
Joined
21/8/04
Messages
1,517
Reaction score
0
vlbaby said:
I use the flasks all the time for my starters. Just cover the top with some aluminium foil and boil it up directly over the gas / electric whatever.
I guess on that note then it would be OK to boil a teflon covered stir bar at the same time, or would that be a bad idea?
 

sosman

beerling
Joined
16/2/04
Messages
1,461
Reaction score
4
ausdb said:
vlbaby said:
I use the flasks all the time for my starters. Just cover the top with some aluminium foil and boil it up directly over the gas / electric whatever.
I guess on that note then it would be OK to boil a teflon covered stir bar at the same time, or would that be a bad idea?
[post="67743"][/post]​
My stir bar goes in the pressure cooker every time. No obvious signs of stress.

From a slant, I go to 250 ml conical. The whole think goes in the pressure cooker and when it cools down, chuck a loop of yeast in there then spin it like buggery (yes less than 5 m/s pedro).
 

homebrewworld.com

Well-Known Member
Joined
26/3/05
Messages
493
Reaction score
0
I cracked a El,Flask the first time i used it...!
To thin and wimpy for me.
Got 2 nice Conical Beakers off ebay ( 1L and 2L) that are thick glass base and sides that would need a bloody good knock to break em.
Straight on the stove, cool, then to the Stir plate ( thanks Joe!)

Cheers
:super:
 

SJW

As you must brew, so you must drink
Joined
10/3/04
Messages
3,401
Reaction score
211
Good advice about using NEW flasks. I found some on Ebay and was wondering is BOROSILICATE as good as PYREX? I just want to be able to boil the cool em.

STEPHEN
 

Airgead

Ohhh... I can write anything I like here
Joined
6/4/05
Messages
3,651
Reaction score
1,054
SJW said:
Good advice about using NEW flasks. I found some on Ebay and was wondering is BOROSILICATE as good as PYREX? I just want to be able to boil the cool em.

STEPHEN
[post="67814"][/post]​
Borosilicate can be heated using direct heat (ie: directly on the stove or over a flame) but I don't know whether its as shatterproof as pyrex when cooled quickly.

If you ever see anything marked soda or flint glass, that isn't safe for direct heat and will shatter if you put it on the stove. OK to autoclave though.

Cheers
Dave
 

homebrewworld.com

Well-Known Member
Joined
26/3/05
Messages
493
Reaction score
0
SJW
Yeah, the Beakers i have are 'Borosilicate' and i am told they are sweet to heat and chill direct quickly.
I am a bit carefull when cooling them though. Given the small volume of liquid in the beaker ( upto 2L ) it cools down quickly when sat on the side of the sink for 30mins. Then thats when i dunk it into cold water in the sink to get it over and done with............
Cheers
:)
 

Batz

Batz Brewery...Hand crafted beers from the 'Batcav
Joined
8/8/03
Messages
12,731
Reaction score
1,418
homebrewworld.com said:
I cracked a El,Flask the first time i used it...!
To thin and wimpy for me.
Got 2 nice Conical Beakers off ebay ( 1L and 2L) that are thick glass base and sides that would need a bloody good knock to break em.
Straight on the stove, cool, then to the Stir plate ( thanks Joe!)

Cheers
:super:
[post="67796"][/post]​

He have an ebay shop?
 

Latest posts

Top