DAVE,
     
     There is another company that sells reagent test kits,  EM Science at 
     1-800-222-0342.
     
     This topic is bigger than you might expect.  There is probably 6 
     levels of tests for waste treatment:
     
     Color indicators strips                 (cost about $0.35 /test)
     Reagent kits w/color indicators         (costs about $0.58 /test)
     Reagent kits w/color wheels             (costs about $0.60/test)
     Colorimeter methods (much more accurate)(costs about $0.51/test)
     Photometer methods (much more accurate) (costs about $0.51/test)
     Titrations (very accurate)   (costs what you pay a trained tech)
     
     I like the old Spect 20 photometer (340-600nm, 600-950 nm) that costs 
     about $1200 (digital version is $1400 or the portable version the 
     Mini-Spect 20 at $800 (battery powered)
     
     If you go upscale you can get the Spect 21 (340 - 1000 nm) for $1800 
     and the digital version for $2800.
     
     Many of the reagent test kits are much more accurate if you use a 
     colorimeter to analyze the color rather than depending on your 
     eyesight (very difficult if you are color blind).
     
     The best way we found to discover colorimetric techniques was from a 
     Russian text on colorimetry.  Seems they don't have the expensive 
     machines we do, like AA's, so they developed very accurate color 
     indicator techniques that work well with the old Spect 20's.  They 
     have procedures for all type of waste water analysis in many ranges 
     that are simple to implement.  Just need to find a Russian 
     translator!!  One of our process engineers was from Poland so he read 
     Russian fluently.  Just put an add in the closest university 
     newsletter and you will find both the text and someone to traslate it 
     for you.  
     
     If you need more info, I can fax you slides from a short course I 
     teach on inexpensive chemical analysis for electronics manufacturing.
     
     Happy Holden / MERIX Corp
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