EPA Method 1687


EPA Method 1687 does not directly match ALS - Columbia's list of currently available methods. Please call for availability.


Method information displayed is provided for informational purposes only. No warranty (express or implied) is made as to the website accuracy, completeness, or applicability (such as the age of a method and whether or not it applies to your project). Please contact us for assistance. Analytical testing dots

PDF IconView Actual EPA Method 1687 (PDF File)


EPA Method 1687:
Total Kjeldahl Nitrogen in Water and Biosolids by Automated Colorimetry with Preliminary Distillation/Digestion

Summary:
The kjeldahl nitrogen in the sample is first converted to ammonia by metal-catalyzed acid digestion. The resulting ammonia is then separated from the sample by distillation. The ammonia released is captured in a dilute sulfuric acid solution. A procedure is given for removal of the ammonia present in the sample prior to digestion. A sample so treated then gives a result of organic nitrogen after digestion/distillation.

Scope:
This method describes procedures for the determination of total kjeldahl nitrogen (TKN) and/or organic nitrogen in drinking, ground, and surface water; domestic and industrial waste; and biosolids (municipal sewage sludge). Digestion/distillation of the TKN from the sample is followed by analysis using automated colorimetry.

Report Number:
821/R-01-004

Analytical testing dots


Examples:  8260
TO-15

Examples:  Dioxin
Mercury
Analytical testing dots


<-- Search All Test Methods



Suggestions? The test methods page continues to expand and improve. If you have suggestions for improvement, we would enjoy hearing from you. Please contact the webmaster here.


Analytical testing dots