Subject: Fw: CS>question..how to get the ppms you want
How to get the PPM's you want Dear Bob, Are you a millionaire?! Can an ordinary person actually purchase a photospectrometer in the States? How much are they over there? and where do you buy? Here in Zimbabwe we have to pay big for assays - ( and are lucky to have such a facility!) Jan Carew -----Original Message----- From: Robert L. Berger <[email protected]> To: [email protected] <[email protected]> Date: Thursday, September 06, 2001 9:19 PM Subject: Re: CS>question..how to get the ppms you want Hi Terri, "Ole Bob" will make many on the list angry but here are the facts. Without some type of current measurement and record keeping people don't know what they are making. One must make seferal btches and have them tested so you can plot the data and have reasonalbe assurance that you know what you are making. Several of the commercial people have automatic shut-off, but until you have had it tested you cannot be sure as to what you are making. There is one very good thing about CS and that is the ppm are not really that important, whether it is 5, 10, or 15. They all work so don't sweet it. I am not a commercial vendor but I do sell to a few locals for $10.00 for 2 liters. The postage for that amount is about $8.50. All of my CS is made by the HVAC ARTC method and the concnetration is 12 to 15 ppm by actual spectrophotometric measuremnt. I have one. "Ole Bob:" [email protected] wrote: Since l am not going to be making my own CS..but purchasing a cs generator..l am wondering how do all the ones making their own CS know what ppm they are getting consistently? if l buy a generator..can l know for sure l will be getting the ppms that l want? also..does anyone have a small amt of cs they could sell me until l am able to get the generator? experienced CS'ers please give me your advice and wisdom..thankyou teri.
