100ppm Colloidal Silver with cinnulin, sodium hydroxide and constant current

[Kephra]

or maybe both...?
Kephra, what is the effect of heat when using NaOH, especially during reducing silver?

Thanks...

Heat does a couple of things.  It in itself will reduce some of the silver.  But more importantly, it increases the solubility of silver oxide so that it has a better chance of being reduced before it becomes concentrated enough to precipitate as large particles of silver oxide.  You want the silver oxide to be reduced at least as fast as it is being produced.

[silverFalcon]

But you add cinnamon after the process is completed, right?

[Kephra]

I mostly add it at the beginning, but I have done it both ways.  That maybe why your CS turned orange.  Just the red color of the cinnamon will color it a little also.

[silverFalcon]

Thanks Kephra. Will do more exercises tonight...

[bsilverman444]

Here are some pictures of 100ppm CS I made using my constant current setup with sodium hydroxide as an electrolyte, and cinnulin as the reducing agent.

I made 250 ml of 100ppm CS, and then diluted 200ml of the product with 800ml of water to make 20ppm.

Here is the 100ppm made by electrolyzing 250 ml distilled water with 4 drops of 1M NaOH plus 2.5ml of my cinnamon extract for 25 minutes.  You can see my stirrer magnet in the bottom.

How long did it take to produce 100ppm, oops sorry i now see 25 minutes?

[broli]

 I used about a cup of dry gin 40% alcohol as the solvent and perhaps a table spoon of fine powder cinnamon. After letting it steep for 24hrs the extract turned very viscous had a really hard time straining it. Should I have used more alcohol?

[bsilverman444]

Just completed my first batch of cs made with sodium hydroxide and cinnamin extract. It turn out well in that it is darker than with salt method, no sediment, no black on the cathode.  I did cook it in ss pot using the pot as the anode, with heat for about 35 minute. Used about 250 ml dw. It has turned a little darker now since it cooled.

Is there a color chart available to judge the ppm?

[Kephra]

no black on the cathode.  I did cook it in ss pot using the pot as the anode

I think you got that backwards. The pot should be the cathode (neg), and the silver should be the anode (positive).

[Kephra]

I used about a cup of dry gin 40% alcohol as the solvent and perhaps a table spoon of fine powder cinnamon. After letting it steep for 24hrs the extract turned very viscous had a really hard time straining it. Should I have used more alcohol?

Thats why I suggested making a "tea bag" for the cinnamon by putting the cinnamon in the center of a coffee filter paper, then tieing up the side and securing it with a wire tie or string.  Put the bag in the alcohol solution for a day or two then just take out the bag and throw away. 

[bsilverman444]

no black on the cathode.  I did cook it in ss pot using the pot as the anode

I think you got that backwards. The pot should be the cathode (neg), and the silver should be the anode (positive).

Of course you are right. I never get that right.

[Kephra]

I have trouble with right and left

[silverFalcon]

OK, here is my 100ppm CS...

1000 ml of distilled water
9 drops of NaOH
4 ml of cinnamon
45 minutes

Kephra, you are true genius...

[broli]

I used about a cup of dry gin 40% alcohol as the solvent and perhaps a table spoon of fine powder cinnamon. After letting it steep for 24hrs the extract turned very viscous had a really hard time straining it. Should I have used more alcohol?

Thats why I suggested making a "tea bag" for the cinnamon by putting the cinnamon in the center of a coffee filter paper, then tieing up the side and securing it with a wire tie or string.  Put the bag in the alcohol solution for a day or two then just take out the bag and throw away.

Thanks for the tip it worked out great this time. I just put some new cinnamon into the solution to increase concentration further.

[broli]

I think I might have used both too much NaOH and cinnamon extract. Solution is crystal clear.

200ppm
800 ml of demineralized water <-- I know, not distilled water
24 drops of 1M NaOH solution
20 ml of cinnamon extract
took almost 4h

Crappy cellphone picture below of 20ppm left and 200ppm right.

[Kephra]

I think I might have used both too much NaOH and cinnamon extract. Solution is crystal clear.

200ppm
800 ml of demineralized water <-- I know, not distilled water

I get pretty good results with reverse osmosis water (reads about 16 on a TDS meter).  Also, when making higher ppm colloidal silver, any contaminants in the water will be a smaller amount compared to the amount of silver. 

24 drops of NaOH

Thats reasonable.  Too little, and your current regulator won't regulate, and silver will plate the cathode.  Too much and the electrode voltage will drop too low (try to stay above 8 volts).

20 ml of cinnamon extract

Again, that sounds reasonable.  The rule of thumb I use is 0.1ml cinnamon for each milligram of silver I am trying to put in the CS.  So 800ml at 200ppm would be 160mg of silver which comes out to 16ml cinnamon give or take.

took almost 4h

Crappy cellphone picture below of 20ppm left and 200ppm right.

Well done!