Hi Ya'all, One list member has sent me a sample of what they are buying as 500 ppm CS. So I ran a study of the material and this is what I found.
The CS was as dark yellow with a strong Tyndall. When I diluted the sample 50/1 in preparation of doing the spectrophotometer analysis, I observed a strange phenomena. Normally the yellow CS when dilute water it is clear. This material remained quite yellow. Being suspicious I placed drop on a piece of white paper along side a drop of very yellow CS of my manufacture. The drop of my CS dried with no color. The other sample had a bright yellow stain. The ppm reading was 35 not 500!!!!! The yellow stain appears to be from yellow food color. Just another rip-off. Someone is sending me a sample 100 ppm wateroz, and I will find out what is in it. Just to refresh the memory of many of the listers, the yellow color of a true CS is due to the colloid' s adsorbing the blue light out of the light spectrum so we see yellow. One cannot duplicate that with a food dye. Robert -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] List maintainer: Mike Devour <[email protected]>
