> > From [email protected] Thu Nov 19 05:34:42 1998 > > <!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN"> > > <HTML> > > <HEAD> > > > > <META content=text/html;charset=iso-8859-1 http-equiv=Content-Type> > > <META content='"MSHTML 4.72.3110.7"' name=GENERATOR> > > </HEAD> > > <BODY bgColor=#ffffff> > > <DIV><FONT color=#000000 size=2>This might be of interest:</FONT></DIV> > > <DIV><FONT color=#000000 size=2> > > <P><FONT face="" size=2><STRONG>The term total dissolved solids</STRONG></FONT> > > <STRONG>(TDS) </STRONG>refers to the sum of all cations or anions, measured in > > parts per million as calcium carbonate. > > <P>
Does this mean that the TDS1 will not be entirely accurate in measuring CS concentration? > > <DL> > > <DT><STRONG>Parts per Million (ppm)</STRONG> > > <DD>The weight to weight ratio of any ion to water. > > <P></P> > > <DT><STRONG>Calcium Carbonate Equivalent</STRONG> > > <DD>Due to the differing molecular weights and valences (charges) of ions, a > > meaningful total of all the ions present in water can be calculated only > > when all of the ionic concentrations are brought to a common denominator. If it is not accurate, is there an easy factor that can be used to convert to PPM silver from the PPM read on the TDS1? > > This common denominator is known as the calcium carbonate equivalent.<BR>It > > is quite simple to calculate: first determine the molecular weight of the > > ion in question; second, divide this molecular weight by the valence of the > > ion to arrive at the equivalent weight; last, divide 50 (the equivalent > > weight of calcium carbonate) by the equivalent weight of the ion. This > > conversion factor from the last step multiplied by the ppm as ion gives the > > ppm as calcium carbonate. </DD></FONT></DL></DIV> > > <DIV><FONT color=#000000 size=2> > > <DT><STRONG>Milligrams per Litre (mg/L)</STRONG> > > <DD>Like grains per gallon, this can be thought of as a measure of the > > concentration of dissolved minerals in a litre of water. It is a weight to > > volume ratio, with the weight of the dissolved minerals expressed as calcium > > carbonate equivalent. </DD></DIV> > > <DIV> </DIV> > > <DIV>All the best, Ivan.</DIV> > > <DIV> </DIV></FONT></BODY></HTML> > > > > ------=_NextPart_000_0081_01BE1413.8CDED320-- Yes, this is what email looks like to the majority of people, who do not use a browser to read mail, when the "encode html" option is not turned off. turf -- 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]>
