Water Environment Federation (WEF) Discussion ForumsWater Environment Federation (WEF) Discussion Forumshttp://www.wef.org/TechnicalDiscussions/jfuller@wef.orgMon, 08 Sep 2008 08:39:14 GMT20http://www.wef.org/TechnicalDiscussions/Topic9089-15-1.aspxI know of a method that does this and expresses the value as "COD" chemical oxygen demand. If you look in the Hach Water Analysis Handbook 4th edition on page 751 there is a method for Manganese III oxidation there. Years ago this was how chemical oxygen demand was first performed, now dichromate is the norm. The problem I see that you might have is whether or not you want to heat the sample or not. Does your client want the compounds that are oxidizable at a particular temperature? There will be a significant difference in the amount of oxidizable material found at room temperature and at 150 degrees. You could also make a standard KMnO4 solution then titrate an aliquot of the acid with it at room temperature. When the oxygen demand of the sample is exhausted you would have a slight purplish color in the water solution. You could then calculate the amount of oxygen that would equate to. Anyway, there is a method for this, but it is adapted as a substitute for COD. You might be able to do this test without any heating whatsoever. Feel free to email me if you would like some help developing a simple test for this.Thu, 08 May 2008 11:14:20 GMTChristopher Fairhttp://www.wef.org/TechnicalDiscussions/Topic9089-15-1.aspxI'm looking for a reference or procedure for "Substances Oxidizable by Permanganate" or "Substances Reducing Permanganate". We are testing sulfuric acid per a customer's specs. The only method I've found is a presence/absence test in an old Merck book, but the spec is "5 mL max", so I need something quantitative.Thu, 08 May 2008 09:46:28 GMTKeith Hoover