Posts tagged 'disinfectant'

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Chloramine on a palintest photometer

Can I measure monochloramine on a palintest photometer? [caption id="" align="aligncenter" width="396"] Chloramine molecule[/caption] Normally, DPD 1 gives free chlorine Addition of DPD 3 (excess KI) gives free and combined chlorine (chloramine) Instead of DPD 3, DPD 2 is used (which has a trace of KI).  This only reacts with monochloramine.  So subtracting the DPD 1 result gives th...
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