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This method is for determining basic organic nitrogen in clear or very light-colored distillates using a visual indicator titration. It is applicable over the range 0.1 to 100 mass-ppm as nitrogen, but is especially useful from 0.1 to 1.0 ppm. Colored samples interfere with the observation of the color indicator and, therefore, cannot be accurately analyzed by this method. Colored samples can be analyzed over a wide concentration range by UOP Method 269.