Louw, J.G.Du Toit, P.J.Union of South Africa. Dept. of Agriculture2015-07-142015-07-1420151933Louw, JG 1933, 'The colorimetric determination of sodium in vegetation', Onderstepoort Journal of Veterinary Science and Animal Industry, vol. 1, no. 2 , pp. 425-435.http://hdl.handle.net/2263/48671The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.(1) A revision of the method by Malan and Van der Lingen for the colorimetric determination of sodium in vegetation is described in detail. (2) Evidence is presented to show that:- (a) .04-0.1 mgm. Na can be determined with reasonable accuracy in the presence of 0.1 mgm. P; when 0.1- 0.2 mgm. Na is to be determined 0.2 mgm. P, and when 0.2-0.8 mgm . Na, up to 0.4 mgm. P may be present. (b) The interference of K is dependent upon absolute concentration and temperature; working at ordinary laboratory temperature ( ± 25° C.) not more than 0.8 mgm. K should be present in the aliquot for a determination. (c) At 26° C. precipitation is complete within experimental error in 30 minutes.en©Union of South Africa, Dept. of Agriculture (original). ©University of Pretoria, Dept. of Library Services (digital).Veterinary medicineSouth AfricaVeterinary reportsVeterinary medicine -- South AfricaPlants -- Effect of sodium onArticle