WEF Discussions — Now on LinkedIn!

WEF is pleased to announce the creation of free LinkedIn groups associated with its technical discussion forum topics. Through these LinkedIn groups, members will be able to view and participate in discussions, as well as communicate with one another via direct messages. Share your experiences and knowledge, ask questions and respond to other discussions as frequently as you like!

You must have a LinkedIn profile to join a LinkedIn group; you can create your profile here. If you already have a LinkedIn profile, all you need to do is submit a request to join one or all of the following groups:

Water Environment Federation (Main) | Biosolids | Collection Systems | Nutrients | Stormwater 
Utility Management | Water Reuse | Water for Jobs | Watershed Management | Laboratory Practices 

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TKN Boling Stones
Jennie Munster
Posted: Tuesday, February 28, 2012 3:29 PM
Joined: 1/18/2012
Posts: 6


Is anyone using broken glass instead of boiling stones for TKN analysis? I'm getting lots of "bumping" during my reaction and the manufacture recommends using broken glass pieces. Doesn't seem like a practice a safety officer would approve of.
Asia Fahad
Posted: Tuesday, February 28, 2012 5:14 PM
Joined: 2/28/2012
Posts: 1


Hi Jennie,

 

We use Teflon boiling chips and have no problem with the pumping during digestion.


Jennie Munster
Posted: Wednesday, February 29, 2012 10:54 AM
Joined: 1/18/2012
Posts: 6


That is what I have been using. I'm also wondering if possibly the flasks are too full of liquid.

 

Do you use the Labconco Micro-Digestion system? I'm adding 5 g of soil, 50 mL of standard and 10 mL of TKN-reagent. This is for my MDL study.

 

When I've added only liquid and less than 50mL I don't get the bumping problem.