Determination of nitrite ions using foam polyurethanesстатья
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Дата последнего поиска статьи во внешних источниках: 12 октября 2013 г.
Аннотация:It is shown that foam polyurethanes, under the action of nitrite ions in the presence of hydrochloric acid, undergo diazotization at the terminal amino groups to yield yellow products. The Gurevich - Kubelka - Munk function of diazotized foam polyurethanes is a linear function of the concentration of nitrite ions in an aqueous solution, which makes it possible to quantify nitrite ions using diffuse-reflection spectroscopy. The detection limit is 0.02 mug/ml. A test system based on the use of foam polyurethanes is proposed for identification and semiquantitative evaluation of nitrite ions in the range of 0.5 - 20 mug/ml.