Nitrogen Determination in Tobacco according to the Kjeldahl Method

BÜCHI Labortechnik AG

It is generally considered that flavour and taste of smoke is correlated with the nitrogenous constituents. Flue-cured tobacco containing 1.6 to 2.3% total nitrogen gives the most satisfying smoke. The acceptable limit of total nitrogen is 1.0 to 3%. Apart from curing difficulty, tobacco with a nitrogen content higher than 3% would result in deep brown coloured trashy leaf which shatters readily and has flat, insipid tasting smoke.
To determine the nitrogen content, the samples require digestion with sulfuric acid to convert nitrogen into ammonium sulphate. After conversion to ammonia through the alkalinization with sodium hydroxide, the samples distilled into a boric acid receiver by steam distillation, followed by a titration with sulfuric acid solution.

Download application Download application Application overview Contact us

Application Download Form

* These fields are mandatory.

** Please note that your personal data will be stored safely and in accordance with the General Data Protection Regulation (GDPR) (EU) 2016/679 on the protection of individuals in relationship with processing personal data and the free movement of such data You have the right to request from us to access all your personal data stored, rectify it, delete or limit the processing of personal data, as well as to withdraw your consent at any time Personal data will not be shared outside our group of companies, nor sold to other companies Personal data may be used for marketing and communication purposes until consent is revoked

See more Applications in:

Analytics Kjeldahl

See more Applications related to:

Distillators & Extractors