| Main Title |
Nitrate interference in total kjeldahl nitrogen determinations and its removal by anion exchange resins / |
| Author |
Schlueter, Albert. ;
Schleuter., Albert
|
| CORP Author |
Central State Univ., Wilberforce, Ohio. Dept. of Chemistry.;Environmental Monitoring and Support Lab.-Cincinnati, Ohio. |
| Publisher |
Environmental Monitoring and Support Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, |
| Year Published |
1977 |
| Report Number |
EPA-600/7-77-017; EPA-R-802755-02 |
| Stock Number |
PB-267 285 |
| OCLC Number |
27243526 |
| Additional Subjects |
Water analysis ;
Nitrogen ;
Water pollution ;
Infrared spectroscopy ;
Concentration(Composition) ;
Organic nitrates ;
Ion exchange resins ;
Temperature ;
Sediments ;
Water quality ;
Microorganisms ;
Electrodes ;
Anions ;
Nitrogen organic compounds ;
Chemical analysis ;
Experimental design ;
Ammonia ;
Kjeldahl method ;
Procedures ;
Water pollution detection ;
Solid wastes
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 600-7-77-017 |
c.1 |
Headquarters Library/Washington,DC |
02/12/2014 |
| EKBD |
EPA-600/7-77-017 |
|
Research Triangle Park Library/RTP, NC |
08/11/2000 |
| ELBD ARCHIVE |
EPA 600-7-77-017 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ESAD |
EPA 600-7-77-017 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
| NTIS |
PB-267 285 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vii, 17 p. : ill. ; 28 cm. |
| Abstract |
The standard methods for analysis of water and waste samples are under continual review to assure that the most accurate results possible are obtained. If a chemical interference in an important analytical procedure is discovered it must be evaluated and if necessary a procedure modification made to circumvent the interference. The interference of nitrate with the determination of total Kjeldahl nitrogen (TKN) was investigated. TKN losses of greater than 90% were observed in solutions containing a nitrate-nitrogen concentration ten times the TKN level. The loss was found by infrared spectroscopy to be occurring due to nitrate and ammonia decomposition to nitrous oxide at the elevated TKN digestion temperatures. Prevention of the nitrate interference in TKN analyses was found to be possible only by removal of nitrate prior to TKN analysis. Several anion-exchange resins in the chloride form were found effective in this removal. Samples containing known TKN levels and high nitrate concentration when treated by these resins prior to TKN analysis gave nearly 100% TKN recovery on TKN analysis. |
| Notes |
"EPA-600/7-77-017." |
