Author Topic: Table salts reacts with particle colloidal silver ??  (Read 168 times)

Offline orionis83

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Table salts reacts with particle colloidal silver ??
« on: April 20, 2019, 01:37:13 PM »
Hi,

Today I added a pinch of table salt in my batch of 40ppm yellow colloidal silver and to my surprise some reaction happened and yellow color was gone. I was under impression that only ionic silver reacts with salt and silver particles will not react. Any idea why this happend and what is this new compound formed ??

I am very confident that yellow silver if more effective than ionic silver but why this color change .

Thanks.

Offline kephra

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Re: Table salts reacts with particle colloidal silver ??
« Reply #1 on: April 20, 2019, 01:43:36 PM »
You are confusing a chemical reaction with an electric reaction.

Ionic silver plus salt gives a chemical reaction where silver oxide converts to silver chloride.

Silver nanoparticles plus salt results in a removal of the electrostatic repulsion between particles.  This allows the silver particles to agglomerate into large particles.  But they are still pure silver, just larger particles.
Colloidal Silver is only a bargain if you make it yourself.

Offline orionis83

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Re: Table salts reacts with particle colloidal silver ??
« Reply #2 on: April 20, 2019, 02:01:21 PM »
Thanks. Will this happen to every kind of particle silver be it reduced using reducer or made using hot method without any reducer ??

Also what shelf life can we expect from particle silver made using maltodextrin as reducer ??

Is there any way to reduce silver without using any reducing agent ... I have read some where that boiling a ionic silver can reduce it ??
I have never tried it ... any idea.


Offline wgpeters

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Re: Table salts reacts with particle colloidal silver ??
« Reply #3 on: April 20, 2019, 02:30:42 PM »
Capping with gelatin will prevent the salt from destroying the colloid.
Ultraviolet light will reduce ionic silver, but the particle size will be very very large.
Heating ionic silver will also reduce it, but it depends on how the ionic silver was made and whether there is any hydrogen left dissolved in the water.  But why would you want to when Karo or malto makes a perfect product.

The shelf life of maltodextrin reduced colloidal silver can be years.  I still have a sample that I made over 10 years ago, and it is still good.
wgpeters aka Kephra

Offline emanwols

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Re: Table salts reacts with particle colloidal silver ??
« Reply #4 on: April 20, 2019, 07:57:14 PM »
talking of ultra violet reduction
I have lately been getting a colour change towards red from yellow when i leave my 40ppm malto reduced colloidal silver (no gel capping) in a 100ml beaker loosely covered on my window sill . This reaction happens in around 4 days.
Why is this happening? light should not have an effect on fully reduced colloidal silver.
I am sure that the beaker was cleaned very well with DW.
« Last Edit: April 20, 2019, 08:17:42 PM by emanwols »

Offline orionis83

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Re: Table salts reacts with particle colloidal silver ??
« Reply #5 on: April 21, 2019, 06:18:01 AM »
Thanks for replying. If malto can give such long shelf life then I am fine with it.

I have one more issue. When I reduce ionic silver there is some black silver deposits on glass at bottom and sides. Is this ok or I am doing some mistake. Is this because of too much heat. I am heating silver in hot water bath.

Offline emanwols

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Re: Table salts reacts with particle colloidal silver ??
« Reply #6 on: April 21, 2019, 04:34:46 PM »
hello orionis83
i think you misunderstand me.
4 days is no time at all. Malto reduced colloidal silver should be stable for far longer. 4 days is nothing. i reckon i am somehow introducing contamination to my small 100ml sample. my other samples that i store as normal do last for many months.
as for the black deposits you are getting that is because you are exceeding the solubility limit of your silver ppm. IS has maximum solubility of 20ppm. if you exceed this then the silver will fall out of solution and accumulate as black deposits because your DW cannot hold anymore silver in suspension or in other words it is saturated.-- this is known as fall out.
If you wish to produce solutions of higher ppm then the agreed method is to include your reducer(e.g maltodextrin) at the start of your production run. that way your silver will reduce as you are producing it and that way you are unlikely to get those black deposits.