I've been wondering about this for quite some time, having read on this
list that ppm is really a measure of weight, not "parts" or
"particles." I'll add a layman's question: is there any scale on
earth that could measure the difference in weight just by putting one's
EIS jar on the scale before and after making the EIS? The precision
would have to be astoundingly high. At those levels, maybe even the
researcher's breathing would throw the results off. Still, I wonder.
On Wednesday, Feb 24, 2010, at 01:58 Asia/Tokyo, Marshall Dudley wrote:
Doing quantitative analysis for silver compounds is really rather
easy, if you have much silver present. The biggest problem is that at
5-20 ppm, the quantities are so small, that getting a good weight on
them is difficult. It can be done though with a good balance, forget
a postage scale.
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