Model : 28900

Micro Kjeldahl Distillation with Digestion Unit:

1. Digestion Unit:

   • Function: The digestion process breaks down the sample to release nitrogen in the form of ammonium ions (NH??). The sample is mixed with concentrated sulfuric acid (H?SO?) and a catalyst (commonly selenium or copper).
   • Process: The sample is heated under controlled conditions, causing it to decompose. Organic nitrogen in the sample is converted into ammonium sulfate (NH?)?SO? during this process.
   • Micro Capability: The unit is designed for handling small sample sizes, which helps reduce reagent consumption and sample waste, making it more efficient for labs dealing with limited sample quantities.

2. Distillation Unit:

   • Function: The distillation unit separates ammonia from the digested sample by adding an alkaline solution (usually sodium hydroxide, NaOH) to convert the ammonium ions into ammonia gas (NH?).
   • Process: The ammonia gas is then distilled and absorbed into a receiving flask containing boric acid (H?BO?) or other absorbing agents.
   • Micro Distillation: As the name implies, the unit is designed for small-scale distillation, reducing reagent use and increasing the precision of the results.

3. Condenser:

   • Function: The condenser cools the distillation vapors and ensures that the ammonia gas condenses back into the absorbing solution. This prevents ammonia loss and ensures that all the distillate is captured for the next steps.

4. Titration Unit:

   • Function: The amount of ammonia present in the distillate is quantified by titration, usually with a standard acid (such as hydrochloric acid, HCl).
   • Process: The ammonia absorbed in the boric acid solution is titrated, and the amount of acid required to neutralize the ammonia is used to calculate the nitrogen content in the sample.
   • Result Calculation: The amount of nitrogen is determined based on the volume of acid consumed during the titration.

Key Advantages of the Micro Kjeldahl Distillation with Digestion Unit:

1. Reduced Sample Size: The micro version is specifically designed to handle smaller sample quantities, which is ideal for laboratories that require high precision and have limited sample availability.

2. Cost Efficiency: The unit requires less reagent compared to traditional Kjeldahl systems, which reduces operational costs for labs.

3. Compact Design: The integrated design combines digestion, distillation, and titration into a single unit, saving space and simplifying workflow in smaller laboratory environments.