Hach DPD free chlorine powder pillows

Water Environment Federation (WEF) Discussion Forums

Home

Members

Calendar

Who's On

Welcome Guest ( Login | Register )

Hach DPD free chlorine powder pillows

Rate Topic

Display Mode

Topic Options

Author

Message

wing

Posted 4/28/2008 11:12:54 AM

Junior Member

Group: Forum Members
Last Login: 7/3/2008 1:25:20 PM
Posts: 20, Visits: 119

I was curious if the free chlorine reagent contains anything to prevent interference from monochloramines. All I saw on the MSDS was a lot of "trade secret". Our water plants use chloramines and I don't know if we can trust our handheld colorimeters in the field when looking for free chlorine.

Thanks

Wing

Post #9005

Christopher Fair

Posted 4/29/2008 12:21:28 PM

Supreme Being

Group: Forum Members
Last Login: 2 days ago @ 5:59:07 PM
Posts: 151, Visits: 203

So long as the reading is taken quickly monochloramine will not interfere at all. There is a very slight interference (<0.10 mg/L) if your monochloramine concentration is 2.5 mg/L or higher if the reading is delayed longer than about 30 seconds from addition of the powder. There is also a powder pillow for measuring only monochloramine and one for measuring ammonia if you need that information.

Christopher Fair
R&D Chemist III
Hach Company
cfair@hach.com
www.boddoctor.com

Post #9019

wing

Posted 4/29/2008 3:53:55 PM

Junior Member

Group: Forum Members
Last Login: 7/3/2008 1:25:20 PM
Posts: 20, Visits: 119

Thank you Thank you Thank you!! That's exactly what I wanted to hear.

Post #9020

« Prev Topic | Next Topic »

Reading This Topic

Active Users: 1 (1 guest, 0 members, 0 anonymous members)

No members currently viewing this topic.

Permissions

All times are GMT -5:00, Time now is 1:44am