{"refrec":{"BRefID":3312,"RR":"<b>Le Poupon, C.; Lin, R.G.; Benaim, J.Y.; Merks, A.G.A.</b> (1997). Research on automation of a reductive dissolved organic nitrogen analyser. <i>Oceanol. Acta 20(2)</i>: 349-358","BEntID":3312,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":null,"RefStringPartII":". <i>Oceanol. Acta 20(2)</i>: 349-358","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Le Poupon, C.; Lin, R.G.; Benaim, J.Y.; Merks, A.G.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Le Poupon, C. <i>et al.</i>","Englishabstract":"The accurate classical batch method of Duursma (1961), based on the conversion of Dissolved Organic Nitrogen (DON) into NH<sub>3</sub>, is used as a basis for a new automatic DON analyser. After testing different possibilities through mechanical automation of the original batch technique, in which the conversion is preceded by the degassing of NH<sub>3</sub> and drying of the sample, the procedure of autoanalyses has been selected. This procedure was simplified to the extent that a compact unit could be constructed, which would easily be applicable on board ship. The automatic method has a conversion phase in which in principle only DON is dissociated to NH<sub>4</sub><sup>+</sup>, whereas both NO<sub>2</sub><sup>-</sup> and NO<sub>3</sub><sup>-</sup> are not reduced. This requires selective conditions and particularly high silver purity for the reactor. Consequently, a total reduction, including NO<sub>2</sub><sup>-</sup> and NO<sub>3</sub><sup>-</sup> is also possible, applying an efficient metal catalyst. Using distilled water, the accuracy of the method is at the level of 3 µM (0.05 mg N/l), whereas the percent conversion of DON into NH<sub>3</sub> is estimated between 80 and 100 %, depending on the applied reference compounds. The method is applicable to both fresh and sea water.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Research on automation of a reductive dissolved organic nitrogen analyser","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1997,"MonPub":null,"DateUpdate":"2001-04-11","DateCreate":"2000-09-06","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1997XC24200002","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":3312,"PubliDate":1997,"Pagination":"349-358","XtraPublOfAnaID":null,"ISBN":null,"Volume":"20","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43599,"SerRR":"Oceanologica Acta. Elsevier/Gauthier-Villars: Montreuil.  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