Fishman, Awhile back you mentioned the COle Parmer kit # 05540-60. It appears it test with color change. The tech folks were little help. My question is can you really detect down to 1 ppm. I have used Lamotte kit for years that works great for 4ppm determinations, but it would be great to be more accurate than that especially 10-30 ppm range. ALso Bill did you buy one of these and try it out? I appreciate y'alls help.
Greg


Greg Grimes
www.lakework.com