Author Topic: 120 ppm gelatin capped  (Read 1173 times)

FlyingDutchman

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120 ppm gelatin capped
« on: December 17, 2018, 02:58:10 PM »
I aimed for production of 80-100 ppm gelatin capped nano silver, followed the recipe for 320 ppm but for 1 litre distilled water (pH seemed a little high, 9,4 but reduction seemed OK). Kept current around 15-17 mA (measured between electrodes) with Voltage around 12-14V, lifting the electrodes (forgot about using just one silver electrode, have to see how that will influence the process  ;) )
What I cannot get my head around is that the colloid does not pass through a "yellow" phase, as you can see in the first pic, after 10 minutes it was already tea colored. Why is that?
The second pic shows after 80 minutes (running a little above 15 mA and with water evaporating , my ppm seemed higher than the 80 ppm I aimed for (I added a little more glucose than required).
After diluting with 5 parts distilled water I reached a color I would consider 20 ppm (Third picture), so that would mean I produced around 120 ppm.

Offline Gene

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Re: 120 ppm gelatin capped
« Reply #1 on: December 17, 2018, 05:31:04 PM »
I make 100-120PPM gel capped all the time.  Looks good.

Offline cfnisbet

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Re: 120 ppm gelatin capped
« Reply #2 on: March 28, 2019, 12:02:20 PM »
I make 100-120PPM gel capped all the time.  Looks good.
Yes, excellent colour.