Abstract: The basic nitrogen in petroleum distillates and petroleum products is an important parameter in petroleum processing. A novel method based on photometric titration was established in order to solve the problems found in the application of the current standard method. The results showed that the test results of many samples determined by photometric titration were in good agreement with the current standard methods. The recovery rate by standard addition of aniline was 93.0%-110.0%. On the basis of ensuring the accuracy, the developed method realizes the automation of the analysis process, expands the applicable range of samples, and improves the environmental friendliness. It provides a better analytical method for determination of basic nitrogen in petroleum distillates and petroleum products.

Key words: basic nitrogen, photometric titration, petroleum distillate, petroleum product