Tom - question re: 'ppm available' vs 'ppm free'

[Guest guest]

On 8/29/2010 1:12 AM, silverfox_science wrote:

> The horse hoof mix ends up with about 500 PPM available chlorine

> dioxide and 50 PPM of that as free chlorine dioxide.

Tom - a couple of questions...

1. Is there always a direct/consistent relationship between

'# ppm available ClO2' and '# ppm free ClO2'?

and

2. Which is the most relevant, wrt (with respect to) oxidizing power?

Meaning, which one is the one to really be concerned with when

calculating dosages, etc?

Thanks...

[Guest guest]

Hello ,

1. No

2. All of the studies use gross available chlorine dioxide.

To expand a little...

The amount of free chlorine dioxide released from the available chlorine dioxide

is related to the PH the sodium chlorite is lowered to. Sodium chlorite has a

PH of around 12. If you lower it to a PH of 8, no chlorine dioxide is released

as free chlorine dioxide. If you lower it to a PH of 7, trace amounts of free

chlorine dioxide are released. At the other end of the scale, if you lower the

PH to 1.5, all of the available chlorine dioxide is released as free chlorine

dioxide.

Industry uses two different methods of activation. When the amount of free

chlorine dioxide does not have to be precise, the amount of acid to add is

specified. For example when using 10% citric acid the ratio of sodium chlorite

to citric acid is 1:1. When precision is needed, acid is added with a specific

PH targeted. In this case you would add enough acid to drop the PH to something

like 3, for example.

Sodium chlorite solutions vary in purity, so testing is necessary to determine

the amount of free chlorine dioxide released per PH value per batch of sodium

chlorite.

Your second question depends upon your point of view. For example the bee study

used 2% sodium chlorite as their base and diluted it down from there. In their

10 PPM dose, they had 10 PPM of possible toxins, but only 6 PPM effective

chlorine dioxide because only about 60% of the available chlorine dioxide can be

converted to actual chlorine dioxide. In the Lubbers test they treated the

water to chlorine dioxide gas to make the 5 PPM concentration, so the available

and free chlorine dioxide are the same in that test.

Research is interested in effective amounts. Safety looks at gross amounts.

Most papers will detail how the chemicals were prepared, and you can go from

there.

There is a difference between chlorine dioxide technology and acidified sodium

chlorite technology. When chlorine dioxide gas is separated from an activated

solution and added to distilled water, you have chlorine dioxide technology.

When adding an acid to sodium chlorite and using the chlorous acid solution, you

have acidified sodium chlorite technology. They both share having chlorine

dioxide in the solution, but in the case of chlorine dioxide technology, there

are no other impurities in the solution. Chlorine dioxide gas and solutions are

used as a biocide. The solution is designed to kill off micro organisms.

Acidified sodium chlorite solutions are used as a biostat. The solution is

designed to prevent micro organisms from growing over a period of time.

The disinfection by product produced by both of these technologies is chlorite.

The amount of chlorite is directly related to the amount of sodium chlorite

used, which is referred to as available chlorine dioxide. This is why acidified

sodium chlorite is not used for water purification. The water ends up with too

high a concentration of chlorite in it when it is mix to produce enough free

chlorine dioxide to kill off the pathogens.

Tom

> > The horse hoof mix ends up with about 500 PPM available chlorine

> > dioxide and 50 PPM of that as free chlorine dioxide.

>

> Tom - a couple of questions...

>

> 1. Is there always a direct/consistent relationship between

> '# ppm available ClO2' and '# ppm free ClO2'?

>

> and

>

> 2. Which is the most relevant, wrt (with respect to) oxidizing power?

> Meaning, which one is the one to really be concerned with when

> calculating dosages, etc?

>

> Thanks...

>