Sithole, Bishop BAzeez, AMRamjugernath, D2014-03-042014-03-042013-11Sithole, B.B., Azeez, A.M and Ramjugernath, D. 2013. A new method for the analysis of soluble and insoluble oxalate in pulp and paper matrices. Journal of Wood Chemistry and Technology, vol. 34, pp 55-660277-3813http://www.tandfonline.com/doi/pdf/10.1080/02773813.2013.827210http://hdl.handle.net/10204/7265Copyright: 2013 Taylor & Francis. This is the pre print version. The definitive version is published in Journal of Wood Chemistry and Technology, vol. 34, pp 55-66A novel method has been developed for determining soluble and insoluble forms of oxalate in pulp and paper samples by ion chromatography. Methanesulphonic acid is used to dissolve insoluble oxalate, and total oxalate is then determined by ion chromatography with suppressed conductivity detection. Soluble oxalate is determined directly by ion chromatography, without prior chemical treatment. Insoluble oxalate is obtained by difference. The method was applied to samples of pulp, process liquors, filtrates, and scale deposits from kraft mills. In kraft mills, considerably higher levels of oxalate were found in the Eop samples compared to those in the brownstock and D0 samples. In both brownstock and Eop samples, oxalate was mainly present in soluble form, whereas the D0-stage contained relatively higher levels of insoluble oxalate.enOxalic acidCalcium oxalateMethanesulphonic acidIon chromatographyPulpPaper industriesArticleSithole, B. B., Azeez, A., & Ramjugernath, D. (2013). A new method for the analysis of soluble and insoluble oxalate in pulp and paper matrices. http://hdl.handle.net/10204/7265Sithole, Bishop B, AM Azeez, and D Ramjugernath "A new method for the analysis of soluble and insoluble oxalate in pulp and paper matrices." (2013) http://hdl.handle.net/10204/7265Sithole BB, Azeez A, Ramjugernath D. A new method for the analysis of soluble and insoluble oxalate in pulp and paper matrices. 2013; http://hdl.handle.net/10204/7265.TY - Article AU - Sithole, Bishop B AU - Azeez, AM AU - Ramjugernath, D AB - A novel method has been developed for determining soluble and insoluble forms of oxalate in pulp and paper samples by ion chromatography. Methanesulphonic acid is used to dissolve insoluble oxalate, and total oxalate is then determined by ion chromatography with suppressed conductivity detection. Soluble oxalate is determined directly by ion chromatography, without prior chemical treatment. Insoluble oxalate is obtained by difference. The method was applied to samples of pulp, process liquors, filtrates, and scale deposits from kraft mills. In kraft mills, considerably higher levels of oxalate were found in the Eop samples compared to those in the brownstock and D0 samples. In both brownstock and Eop samples, oxalate was mainly present in soluble form, whereas the D0-stage contained relatively higher levels of insoluble oxalate. DA - 2013-11 DB - ResearchSpace DP - CSIR KW - Oxalic acid KW - Calcium oxalate KW - Methanesulphonic acid KW - Ion chromatography KW - Pulp KW - Paper industries LK - https://researchspace.csir.co.za PY - 2013 SM - 0277-3813 T1 - A new method for the analysis of soluble and insoluble oxalate in pulp and paper matrices TI - A new method for the analysis of soluble and insoluble oxalate in pulp and paper matrices UR - http://hdl.handle.net/10204/7265 ER -