Purging of nitrogen is required while acid base titration of unknown samples ?

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Ashokkumar V. Rajani

In acid-base titration purging of nitrogen gas in not necessary

Mohamed A. Fahmy

https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Book%3A_Analytical_Chemistry_2.0_(Harvey)/09_Titrimetric_Methods/9.2%3A_Acid%E2%80%93Base_Titrations

Paul Milham

If it's carbonate titrated with a strong acid, the classical technique is to titrate, boil out the CO2 and complete the titration. So horses for courses ....

Jai Ghosh

It is not necessary, promarily because the nitrogen gas has to be very pure. The most commercial ones contain traces of oxygen. It is better to use argon.