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Colloidal Silver Dropping in PPM Between Production and Reduction

Posted By PNGento (Palatka FL) on 03/25/2025

I followed Diedre's instructions and using a TDS meter (total dissolved solids), after the production using DC current and an electrolyte, my final reading was 20 PPM. Then, when I reduced using a 50:50 Karo syrup:distilled water, the PPM drops to around 8 PPM. Why is this? Color looks good and taste is good, but why the drop in PPM?

Replied by Art (California) on 03/25/2025

Hi PNGento,

Here is a good explanation of why a TDS meter can not measure PPM of silver nanoparticles (AgNPs) :

https://wgpeters.wordpress.com/how-to-make-colloidal-gold-and-silver/why-tds-meters-can-not-measure-colloidal-silver-accurately/

The TDS meter is mainly useful for determining if your distilled water is distilled enough to make AgNPs with it.

Art

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