Oxygen absorbers .. test

Food, Nutrition and Agriculture
skippy

Oxygen absorbers .. test

Post by skippy »

Ok .. now I want to have a go at testing if "hothands" type handwarmers realy effectivly remove O2 from a sealed environment. ie; a bag of rice.

1) I have a sealed environment (the bag of rice with a hothands in it)
2) I have an oxygen analyser

However the anayliser requires a flow of air over the sensor ....so how do I get a flow of the contents ofa sealed container over the sensor?
:ugeek:


skippy
the-gnole

Re: Oxygen absorbers .. test

Post by the-gnole »

Skippy, IIRC oxygen absorbers work by using up the oxygen in an enclosed space, so if you put rice in a mylar bag and then put in an oxygen absorber and then seal the bag it will act like a vacuum.

I may be wrong, but that is my recollection.
WhiteWolf

Re: Oxygen absorbers .. test

Post by WhiteWolf »

the-gnole wrote:Skippy, IIRC oxygen absorbers work by using up the oxygen in an enclosed space, so if you put rice in a mylar bag and then put in an oxygen absorber and then seal the bag it will act like a vacuum.

I may be wrong, but that is my recollection.
Yup that's what I've on the videos. The mylar bags go rock hard once the absorbers have used up all the O2.

WW 8-)
the-gnole

Re: Oxygen absorbers .. test

Post by the-gnole »

So not necessarily a good idea to use with contents that might puncture the bag :shock:
Ian

Re: Oxygen absorbers .. test

Post by Ian »

Probably not, but Oxygen is only 20% of the volume of the air so just don't squeeze most of the air out of the bag, what is left will 'pad' the contents like a crisp packet. Don't forget the air space around each grain of rice when calculating/guessing the air space.

Even not squeezed down, sharp bits tend to damage the Mylar type of bag. That is one reason I use the normal barrier bags which are more robust and work as well as or better than Mylar. Barrier bags also don't need packing in plastic buckets for protection, I just use those scrap copier paper boxes for my stores. Cost nothing and easy to stack and move.
the-gnole

Re: Oxygen absorbers .. test

Post by the-gnole »

Have you a link to the barrier bags please Ian?
skippy

Re: Oxygen absorbers .. test

Post by skippy »

Yes thats what I understand too ... so how do you know what percentage of the oxygen is used up by the absorber?
Science .... its great!
the-gnole

Re: Oxygen absorbers .. test

Post by the-gnole »

I would say that using "hot hands" it is more guess work than science. :lol:

With the proper O2 absorbers it is more science than guess work. :mrgreen:
WhiteWolf

Re: Oxygen absorbers .. test

Post by WhiteWolf »

skippy wrote:Yes thats what I understand too ... so how do you know what percentage of the oxygen is used up by the absorber?
Science .... its great!
This may help a little bit

LINK
the-gnole

Re: Oxygen absorbers .. test

Post by the-gnole »

WhiteWolf wrote:
skippy wrote:Yes thats what I understand too ... so how do you know what percentage of the oxygen is used up by the absorber?
Science .... its great!
This may help a little bit

LINK
Good one WW