{"refrec":{"BRefID":7858,"RR":"<b>Goeyens, L.; Kindermans, N.; Yusuf, M.A.; Elskens, M.</b> (1998). A room temperature procedure for the manual determination of urea in seawater. <i>Est., Coast. and Shelf Sci. 47(4)</i>: 415-418","BEntID":7858,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Est., Coast. and Shelf Sci. 47(4)</i>: 415-418","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Goeyens, L.; Kindermans, N.; Yusuf, M.A.; Elskens, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Goeyens, L. <i>et al.</i>","Englishabstract":"Several earlier studies underpin the important role of dissolved organic matter and more particularly urea in phytoplanktonic nitrogen uptake fluxes. Generally, the determination of urea concentrations relies on the formation of an imidazolone-thiosemicarbizide complex, a complexation which requires very accurate temperature control when carried out at high temperature. It is also possible, however, to obtain reliable results with a room temperature procedure. The measured abundances for both complexation at high temperature (85 degree C, 20 min) and at ambient temperature (22 degree C, 72 h) are closely comparable. Lower values are observed for temperatures <10 degree C though. Moreover, a comparison of both techniques reveals similar precision (coefficient of variation: 2%), sensitivity (slope of calibration line: 0.2) and detection limit (0.14 mM). The room temperature alternative to the earlier described method is therefore a handy tool for urea analyses, when a strict temperature control is difficult or impossible.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"A room temperature procedure for the manual determination of urea in seawater","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:01.897972","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1998,"MonPub":null,"DateUpdate":"2001-04-23","DateCreate":"2001-04-23","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000076708300003","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":7858,"PubliDate":1998,"Pagination":"415-418","XtraPublOfAnaID":null,"ISBN":null,"Volume":"47","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44109,"SerRR":"Estuarine, Coastal and Shelf Science. Academic Press: London; New York.  ISSN 0272-7714; e-ISSN 1096-0015","StandardTitleSer":"Estuarine, Coastal and Shelf Science","ISSN":"0272-7714","AbbrevSer":"Est., Coast. and Shelf Sci.","StandardTitleMon":null,"StartPage":415,"Pages":4,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Goeyens","Firstname":null,"Initials":"L.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7858,"AutID":3737,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":154,"InsID":null},{"AutName":"Kindermans","Firstname":null,"Initials":"N.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7858,"AutID":11946,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Yusuf","Firstname":"M. Abu","Initials":"M.A.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7858,"AutID":11948,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Elskens","Firstname":"Marc","Initials":"M.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7858,"AutID":3736,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":"0000-0002-8862-9422","PersID":677,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":7858,"LibID":36,"BRefID":7858,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"7858","RFID":null,"PaidValue":null,"Medium":"Server","Description":null,"Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Open Marien Archief","URL":null,"ClassifID":235,"Classification":"Open Marine Archive","ReqLink":null,"ClassifTypID":5,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":0,"InternalReq":0,"LoggedInReq":0,"Disclaimer":"Disclaimer_OMA","DutchDisclaimer":null,"FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"Academic Press","City":"London; New York"}],"MONpubls":null,"pictures":[],"thestermsPath":[{"ThesaurusTerm":"Water analysis","ThestID":9076,"Acronym":"ASFA","ThesTermPath":"Analysis > Water analysis"},{"ThesaurusTerm":"Urea","ThestID":8918,"Acronym":"ASFA","ThesTermPath":"Chemical compounds > Organic compounds > Urea"},{"ThesaurusTerm":"Dissolved organic carbon","ThestID":2379,"Acronym":"ASFA","ThesTermPath":"Organic matter > Carbon > Organic carbon > Dissolved organic matter > Dissolved organic carbon"},{"ThesaurusTerm":"Temperature","ThestID":8411,"Acronym":"ASFA","ThesTermPath":"Properties > Physical properties > Thermodynamic properties > Temperature"},{"ThesaurusTerm":"Sea water","ThestID":7286,"Acronym":"ASFA","ThesTermPath":"Water > Sea water"}],"thestermsASFA":[{"ThesaurusTerm":"Dissolved organic carbon"},{"ThesaurusTerm":"Sea water"},{"ThesaurusTerm":"Temperature"},{"ThesaurusTerm":"Urea"},{"ThesaurusTerm":"Water analysis"}],"taxtermsASFA":null,"geotermsASFA":null,"collections":[{"Collection":"OMA - Open Marien Archief","ShortName":"OMA"}],"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"},"221":{"SpName":"OMA - Open Marien Archief","SpColID":221,"ParSpColID":null,"TopParID":null,"ShortName":"OMA","URLLocation":null,"LibID":36,"OpenRepoFlag":1,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"OMA"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":7858,"AbstractFlag":-1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":7858,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":null,"thesterms":[{"ThesaurusTerm":"Dissolved organic carbon","ThestID":2379,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Sea water","ThestID":7286,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Temperature","ThestID":8411,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Urea","ThestID":8918,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Water analysis","ThestID":9076,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxterms":null,"geoterms":null,"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":[{"ThesaurusTerm":"Dissolved organic carbon","DutchTerm":"Opgelost organisch koolstof","ThestID":2379,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Sea water","DutchTerm":"Zeewater","ThestID":7286,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Temperature","DutchTerm":"Temperatuur","ThestID":8411,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Urea","DutchTerm":"Ureum","ThestID":8918,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"},{"ThesaurusTerm":"Water analysis","DutchTerm":"Wateranalyse","ThestID":9076,"Acronym":"ASFA","ThesTypID":1,"ThesType":"ASFA Thesaurus List"}],"taxtermsFRIS":null,"geotermsFRIS":null,"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Chisala, Chilekwa, C.","newSesDate":{"date":"2001-04-23 09:16:05.203000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Chisala, Chilekwa, C.","updSesDate":{"date":"2001-04-23 09:16:05.203000","timezone_type":3,"timezone":"Europe/Brussels"}}}