This is an old debate from archives. I notice that no mention was made
of the type of glass. Glass is quite variable, and so the experiments
raise more questions .
regards,
John Plumridge
weblog: http://soupdrive.mightyzero.com/
Re: CS>The Glass vs Plastic debate..
• From: Tony Moody (view other messages by this author)
• Date: Mon, 24 May 2004 04:46:34
Hi,
A few points which don't seem quite correct to me:
They talk of silver solution but NOT of colloidal silver or ionic
silver or
EIS. It would seem to me that silver nitrate or silver protein
solutions
which is maybe what they wer using, would be different from CS .
Pure conjecture on my part here; It is possible that there is
something in the plastic that is poisoning the Staph!! I wonder if they
did a control of distilled water in the plastic and glass tubes.
Also 2.5ppm and 5ppm seem very very high for invitro. I would
expect an order or two of magnitude less. I wonder why they have to
use such a strong solution. I understand that a teaspoon or two of
5ppm CS in a gallon of milk will stop it curdling. That is in the order
of about 0.01 ppm. Which is about 100 times less than they are
speaking of. ???
Tony
On 24 May 2004 at 1:08, [email protected] wrote:
>
> Anyone find these comments to be true? This is an article from ABL
> labs web page. The findings suggest that plastic may be better than
> glass for cs storage. Does ABL use plastic for there ASAP solution?
> Thanks
> Steve
>
> Silver in Glass vs. Plastic Containers
>
>
> Introduction
>
> A great deal of controversy has arisen in the market place on the
> question of whether it is better to store silver solutions in glass
> versus plastic containers. There is a misconception that has
> prevailed in the market place that glass is better. The idea that
> glass containers are better for storing products which contain silver
> has never been proven scientifically. In fact, it has been reported
> in other studies that glass may have a detrimental effect on silver
> products.
>
> Test Work
>
> I have been conducting biological studies for 3 years, in the
> laboratory of a major private institution, on the use of silver
> products to kill and inhibit the growth of bacteria. I have
conducted
> thousands of tests on numerous strains of pathogenic bacteria. In the
> testing I have completed, I have used both glass (5 ml glass test
> tubes) and plastic (Falcon 5 ml polypropylene plastic test tubes). In
> some of the test work we found that there was a difference in the
> amount of silver that was needed to kill the bacteria when glass was
> used versus plastic test tubes. In order to make sure this was the
> case, it was decided that the MIC tests (Minimum Inhibitory
> Concentration) should be replicated by more than one person and a
> direct comparison was made. The MIC tests were performed in
> triplicate in both 5 ml 13X100mm glass test tubes and 5 ml Falcon
> polypropylene plastic test tubes. Results of the bacterial (MIC)
> tests showed that Staphylococcus aureus was inhibited at 2.5 ppm!
> when the MIC test was performed in the plastic test tubes. S.
> aureus was inhibited at 5 ppm when the MIC test was performed in
> glass test tubes. This suggested that the material with which the
> test tubes were made, specifically glass or plastic, may have
> effected the results of the MIC test. Numerous other tests were
> also completed using larger concentrations of bacterium and in
those
> tests it was found that there was no significant difference at all
> between using the glass test tubes versus plastic test tubes.
>
> Other Studies
>
> The studies which I performed are not the only tests showing that
> glass, in some circumstances, may have a detrimental effect on silver
> products. It has been noted in another independent study which has
> been cited by other researchers that silver can adsorb to glass
> (Chambers 1960; Thurman 1989). With this in mind, it may have been
> possible that the silver could have adsorbed to the surface of the
> glass test tubes reducing the concentration of available silver
> interacting with the bacteria which resulted in having to use a
higher
> amount of silver to kill the bacteria when the glass test tubes were
> used.
>
> Conclusion
>
> In the test work I have completed as well as in other available
> studies, it was found that glass may, in some cases, have a
> detrimental effect on silver products. While it can be said that
> glass did not always show the detrimental effect, it can also be
> stated that we found no problems at all with using the plastic
instead
> of glass. Our tests, in conclusion with the other available
> independent study (1Chambers et al. and 2Thurman et al.), would
> suggest, by inference, that silver products should not be stored in
> glass containers which could reduce the available concentration of
> silver, but rather in a high quality plastic container.
>
> Respectively,
>
> David A. Revelli, MS "
>
>
>
>
>
>
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