>Some time ago I sent in some batches of CS (27 VDC method) for total silver
>and resistivity measurements at an environmental lab. I have plotted
>resistivity against silver concentration, as shown on the attached Excel
>spreadsheet.
>Three of the readings make a fairly straight line. However, the low
>concentration sample (9.12 ppm vs 59,500) is way off. Anyone have any
>thoughts as to why this might be??
>Dean
It makes all the difference in the world if you rinse every thing
2-3 times first with the distilled water. If you don't then you will get
different resistance readings. To explain you can use a resistance meter
to measure the resistance in distilled water. Pure distilled water is a
perfict resistor letting no current flow through. If you add just one
drop of tap water to that it will let current flow. You can even poor
distilled water into a dry glass and change the resistance of the
distilled water. It's as if the distilled water is a spunge that soaks
up every contaminate in anything that it's poored into.
Take Care
Reid
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