Determination of nitrogen content in lubricating oil

According to ASTM standard D 3228-05, this article introduces a simple and fast determination process for determining the nitrogen content in lubricating oil according to the Kjeldahl method. The sample is digested with sulfuric acid on SpeedDigesterK-436 or K-439, and then on K-360 Perform distillation titration. There is no difference between the results obtained on K-436 and K-439. The measured nitrogen content results are reliable, and the repeatability results are also very good.

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