Total nitrogen is the sum of the inorganic nitrogen, organic nitrogen, and ammonia. The sum of organic nitrogen and ammonia, total Kjeldahl nitrogen (TKN), are traditionally measured using EPA methods 351.2 and 351.4, while inorganic nitrite and nitrate a
used for estimating the nitrogen content of foodstuffs, fertilizers, and other substances.
| السبت | مغلق |
|---|---|
| الأحد | 09:00 - 15:00 |
| الإثنين | 09:00 - 15:00 |
| الثلاثاء | 09:00 - 15:00 |
| الأربعاء | 09:00 - 15:00 |
| الخميس | 09:00 - 15:00 |
| الجمعة | مغلق |
الأحد, الإثنين, الثلاثاء, الأربعاء, الخميس, 09:00 - 15:00
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