k2006 and CC

[fhorta]

Hello. Just have a quick question on testing combined chlorine with k2006 kit. According to kit instructions, after testing for free chlorine we add 5 drops of some reagant , don't remember the name of that reagant, and then colorless sample should turn pink if combined chlorine is present. Here is my question. When I put the 5 drops of reagant to colorless sample sample stays clear; but only momentarily. I left the sample setting there while brushing the pool and when I came back sample had turned a little pink. Is this normal or should sample turn pink immediately upon adding 5 drops of reagant? Obviously I'm concerned because I don't know if there is cc present or not. Especially now since i'm dealing with an algae problem..thanks in advance.

[AnnaK]

Please see post #3 in this thread: http://www.poolforum.com/pf2/showthr...bined-chlorine

If you have measurable CCs, that is 0.5 ppm or more in a 10 ml sample, the solution will turn pink immediately. You could try to test on a 25 ml sample which increments at 0.2 ppm but you'll use more reagents and won't really gain any significant information.

[fhorta]

thank you so much. one other thing. on that post you say to add 3 drops of said reagant to 10 ml sample and see if it turns pink. however, kit instructs to add 5 drops. is this enough for concern?

[Watermom]

5 drops is correct.

[AnnaK]

That should have said "5 drops of R-0003". Thank you much for pointing it out, I've corrected it in the original thread.