Hi James; >From the local hobby shop a 50 ml graduate in plastic is $5.00 and glass is $7.50.
James to get around the need for matched test tubes you can handle it one of several ways; Make a double volume sample 100 cc and divide it. 1.) Mix the Hach chemicals and add the diluted 50 cc of cs. (hold the other half) 2.) Put a thiosulphate packet in each of two test tubes, and add 25 cc of CS to each. Number the test tubes. 3.) Balance your spect. with one of these. rinse the TT and add 25 cc of the part on hold. Make your reading. Now do the same with the other test tube. The results will indicate the match. Another way would be to mark the test tubes and only use a particular one for each step. Even though I have matched cuevettes, I have marked one that I always use for the blank. BTW the large size test tubes are $2.50. If you want anything I will buy it and ship it, only asking purchace price plus the postage. "Ole Bob" -- 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] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
