MAY 2008, ISSUE 7

TKN/TKP versus TN/TP Explained —
Get the Answers from the Experts!

What are the differences between Total Kjeldahl Nitrogen (TKN) and Total Nitrogen (TN)? What about Total Kjeldahl Phosphorus (TKP) and Total Phosphorus (TP)? How is sample preparation done for these methods? And should sample particulates be given special consideration in choosing a method?

Our Applications Chemists have prepared an overview to these methods.

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New Lachat Methods gain USEPA Approval
for Drinking Water!

Lachat Instruments announces USEPA approval of their newly
developed Ultra High Throughput Methods for Total Cyanide, Ortho-phosphate, and Nitrate/Nitrite under the National Primary Drinking Water (NPDWR) Regulations.

Virginia AWWA — Aug 4-5, 2008
See you in Charlottesville!

The VA AWWA/VWEA Laboratory Practice Committee announces the 14th Annual Good Laboratory Practices (GLP) Conference, to be held in Charlottesville, Virginia on August 4-5, 2008 at the Omni Charlottesville Hotel.

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NEW Lachat Dual Digestion methods for
Total Nitrogen and Total Phosphorous

In addition to single parameter digest methods, Lachat Instruments introduces new Dual Digestion methods
for the determination of Total Nitrogen and Total Phosphorus in a single Manual Persulfate digest.
more info Lachat Communicator