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English Translations » 信息处理 » Method for the determination of basic nitrogen in petroleum

Method for the determination of basic nitrogen in petroleum products

2009-03-31View Original

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In experiments, it is often found that the titration endpoint is not easy to determine. I would like to ask if anyone has any relevant experience in this regard. Although the standards state that the solution changes from purple to blue, at what point exactly should the addition of reagent be stopped? Is blue appearing? Has the purple completely disappeared? Is green appearing? There is a large variation in the data from when blue appears until purple completely disappears, and often, when green appears, the solution still has some purple tint.

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Translated at 2026-07-28 01:49:22

Original: https://bbs.hcbbs.com/thread-430953-1-1.html

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