{"refrec":{"BRefID":12846,"RR":"<b>van Langeveld, A.D.</b> (1977). Het verwijderen van organisch materiaal uit kleimineralen. <i>Interne verslagen Nederlands Instituut voor Onderzoek der Zee</i>, 1977(13). NIOZ: Texel. 49 pp.","BEntID":12846,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>Interne verslagen Nederlands Instituut voor Onderzoek der Zee</i>, 1977(13). NIOZ: Texel.  49 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"van Langeveld, A.D.","OrigTitleTranslFlag":1,"Authorstringtrunc":"van Langeveld, A.D.","Englishabstract":"A few methods were used to remove organic matter from a clay sample from the North Sea. The treated sample was compared with the untreated sample. Xray diffraction pattern of the clay sample were made on some experimental conditions also. The carbon content was estimated. Of the methods used the bromine treatment seemed to be the best.","AbstractOtherLang":"Een aantal methodes, om organisch materiaal uit klei te verwijderen, werd toegepast op een Noordzee-kleimonster, waarna behandelde kleien vergeleken werden met de onbehandelde klei. Hiertoe werden onder verschillende experimentele condities röntgendiffractogrammen van de kleien gemaakt, en werden de koolstofgehaltes van de kleien bepaald. 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