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 ....