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<br />._._m. .. <br />r <br />Page 2 - #21961 <br />Wastes, Environmental Protection Agency, 1971). The method <br />measures distillable phenolic compounds only. For convenience <br />a smaller distillation apparatus ai..i sa.apl~ w -re used. Recovery <br />of a standard phenol sample using these modifications was excellent. <br />G~anide <br />In analyzing the cyanide (CN-) the EPA procedure (ibid.) for cyanide <br />was followed. <br />Total Nitrogen <br />Samples equivalent to SO g of sand were digested with 5 ml concentrated <br />sulfuric acid until a clear solution was obtained. For the cured and <br />uncured samples ane drop of 30~ H2O2 was added to aid in the oxidation <br />of the organic material. This treatment should be sufficient for <br /> <br />;~ . <br />:... <br />~~ <br />~- <br />~- <br />~~: <br />~- <br />~. <br />.1 <br />:~ <br />urea and similar materials. In the case of the 6" and 7" samples <br />murcuric oxide was added as catalyst. The mercuric oxide treatment <br />will convert the nitrogen in some of the more difficult to oxidize <br />materials to ammonium sulfate. With-this treatment slightly higher <br />results might be obtained on these samples in the low ppm range than <br />would be obtained with the catalyst. <br />After digestion of the sample the sulfuric acid was diluted with water, <br />allowed to cool, and made to 100 ml total volume. A suitable aliquot <br />was taken (sometimes further diluted) for the analysis. When more <br />than 2 ml aliquot of the original solution was needed to complete the <br />analysis, it was necessary to adjust the pH of the solution to 3-6 <br />hPf~rs continuing the analysis. <br />sods ~~e~~o~~t~on <br />