In my laboratory we are able to determine Nitrate , Nitrite, Ammonium ion by ion chromatography. is it logical or not to determine total Nitrogen from those ion by converting molecular weight . total nitrogen tested from soil.
If you only include the three ions, you will ignore any organic nitrogen. As you work with soils, that may bring about a sizable error. In addition to your IC measurements, you should do the Kjeldahl test, which will give you organic nitrogen and NH3+NH4+. Then you have to do some arithmetic and put together your total N.
I think that you should try Kjeldahl method after you digest the soil sample. As you talk about total N, you must determine the organic N. Soil digestion will transfer all the organic forms of N to a mineral forms easy to determine by Kjeldahl method.
To determination of total N in soil sample, you should use kjeldahl method.Since, total N includes the organic and mineral nitrogen .You cant use from ion chromatography method. Because of, the organic nitrogen wasn't measured in this method.
Dear Dr Rahaman nitrate, nitrite and ammonium ions indicate the available form of nitrogen and total nitrogen also includes the organic form of nitrogen. It can be calculated by Kjeldhal method as in this method the organic form of nitrogen is digested by use of conc. H2SO4 and by heating.
- Badges
- Science topic