Production Techniques and Chemistry > Colloidal Silver Production

40 PPM Colloidal Silver, gel-capped and glucose reduced

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Argentum:
Figured it was time to move up to higher ppm, having made several successful batches of 20 ppm (non-capped). One thing with the 40 ppm colloidal silver is that it is slightly darker in color. Even diluted to 20 ppm with distilled water. In the picture the measuring cup on the left is diluted to 20 ppm, the bottle on the right is the 40 ppm colloidal silver.

This is on a windowsill with natural light from behind and the camera flash from the front. Although, that picture was taken yesterday, now looking at the bottles the 20 ppm diluted colloidal silver is lighter in color. Difficult to get good pictures that show the real color.

Here is how I made it, recipe:

0.4 grams knox gelatine
large pinch of glucose (sweet & low)
1 qt DW
10 drops sodium carbonate solution

Large silver anode, small copper cathode

Process:

Placed 1 qt mason jar in a pot on the stove (cold to start), added gelatine and let sit for a few minutes, then stirred in.
Added sodium carbonate and glucose, turned on the heat to the double boiler.

Set up electrodes and stirrer up top of mason jar. Adjusted for about 15 volts across the cell, current at 5 mA (regulated).

As the water in the pot heated up to about 85*C, turned down the stove top heat.  Also as the cell heated up the voltage dropped, so adjusted the cathode to keep it in the 14 - 16 volt range.

After 2 hours shut it down and left the colloidal silver to cool. The next day (yesterday) some was diluted to 20 ppm and the picture taken. The colloidal silver is crystal clear, just a tad darker then I expected.

Argentum

RickinWI:
Looks fine. If you wanted it to turn out a lighter shade of yellow you could add more electrolyte. You added 10 drops. You could increase that to 20 drops (1 ml.) If your electrolyte is 1 Molar.

For 40 PPM you might want 0.5 gm gelatin & if you wanted to try 80 PPM then you'd have to up the gelatin to about 1 gm.

That's nice that you can stir it from the top, allowing you to add the heat from below. What type of apparatus is that?

Argentum:

--- Quote from: RickinWI on July 03, 2015, 06:27:15 PM ---Looks fine. If you wanted it to turn out a lighter shade of yellow you could add more electrolyte. You added 10 drops. You could increase that to 20 drops (1 ml.) If your electrolyte is 1 Molar.
--- End quote ---

Worth trying, once I get the mason jar cell clean I'll run another batch. With the darker color colloidal silver being OK it isn't important to lighten it.


--- Quote ---For 40 PPM you might want 0.5 gm gelatin & if you wanted to try 80 PPM then you'd have to up the gelatin to about 1 gm.
--- End quote ---

A little more gelatine shouldn't hurt.


--- Quote ---That's nice that you can stir it from the top, allowing you to add the heat from below. What type of apparatus is that?
--- End quote ---

I have a small build thread here:

http://www.cgcsforum.org/index.php?topic=2210.0

The fan motor on top spins a thin PVC square stock. However, I don't like the doing this with high water temperatures. Need to get something in PTFE and hang it from the spinner.

Argentum

PeterXXL:
You never wrote how much (volume) your batch was. You wrote 1 qt. How much is that in liter or milliliter? Please note, that all countries in the world except US uses the metric system, so by referring to the US system of measurement, all of us who are not located in the US, or of american origin, find it problematic to "translate" it to the metric equivalent.

If it was 1 liter (1000 ml) then I believe than 10 drops of 1-mol sodium carbonate is not enough, as this is equal to about 0.5 ml. I strongly suggest all to buy plastic syringes that can measure up to 1.0 ml, like this one...

http://ecx.images-amazon.com/images/I/51JtPD2yeVL._SL1000_.jpg

...and that we measure in ml (milliliters) instead of drops (as a drop can be of very different size and volume). It should be possible to buy them at the nearest Pharmacy.

For 1 liter (1000 ml) water, 1.0 ml of 1-mol sodium carbonate is needed and should also be enough, unless you want to raise the pH-level

When it comes to Gelatin, I believe that the 0.4 gram (400 mg) you used is enough. But Gelatin is not one single defined chemical substance but a mix of proteins and peptides with a molar mass that differs from source to source. I have used 200 mg (0.2 gram) to make 250 ml of 500 ppm batches recently, which seem to be enough. But it only confirms that the Gelatin that I have bought have that quality.

Anyway, your batch seem to be of good quality. And the somewhat darker yellow might confirm that it's actually a higher concentration, as neither glucose nor gelatin will make the solution darker (like cinnamon and tannic acid do).  So I suggest that you connect the electrodes to a Multimeter and measure the current to confirm that the current regulator actually limts the current to 5 mA.

Argentum:
One quart is a hair under a liter, about .946 L equals a quart. Being that they are almost the same volume, I treat them as the same. Another way to look at it, as I was shooting for 40 ppm, is that with 2 hours at 5 mA, a quart would end up at 42.3 ppm. Which at this time doesn't matter to me.

The other issue is, how much does the 1-quart mason jar really hold? As I'll be cleaning the film out of it today I'll also measure the volume of the jar. I should be more accurate in making colloidal silver. I was in the past when I started out making smaller batches (300 ml).

For the sodium carbonate, it has been posted here that between 10 and 20 drops (.5ml - 1 ml) of 1 mole solution is good to go for a liter of DW. I do have some small syringes. That is a good idea to use a syringe rather then drops, easy enough. I'll up the dose in the next batch, likely try .75 ml per liter.


--- Quote ---your batch seem to be of good quality. And the somewhat darker yellow might confirm that it's actually a higher concentration
--- End quote ---

It was the darker yellow of the diluted colloidal silver that threw me. I was expecting it to be a more yellow color such as the straight 20 ppm colloidal silver I had made in the past. But then again I've seen others here post the same thing, that it turns out slightly darker, a more amber or honey color.


--- Quote ---measure the current to confirm that the current regulator actually limts the current to 5 mA.
--- End quote ---
 

I always do this at the beginning once the cell is going. Just to make sure that the electronics didn't die. Between that and checking the voltage across the electrodes on a regular basis I figure it is good to go.

Argentum

P.S. your work with the stomach acid is superb.

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