Automatic Kjeldahl Protein Analyzer

Steam  distillation system  Kjeldahl, complete  with automated  “ON-LINE”  analysis (evaluation in real time). For systematic precise analysis, with minimum personnel intervention, simple and safe.   Adequate for a laboratory with a medium to large throughput of samples.

The Kjeldahl steam  distillation unit «PRO-NITRO  A» evaluates the distillate at the sa- me time as it is produced ( evaluation «On-Line»), the evaluation and distillation are completed  as one operation, reducing drastically the analysis time.  This type of eva- luation offers the following additional advantages:  detects  the point where the sam- ple no longer produces  Nitrogen, which means that, the distillation stops at the opti- mum maximum Nitrogen recovery and does not prolong the analysis longer than necessary.

FEATURES

Distillation by steam generation.

Automatic «On-line» colorimetric evaluation.

Steam generator with safety thermostat,  over temperature  and over pressure device. Safety, door closed, that prevents distillation if open.

Detects that a digestion/distillation tube is present. This prevents  the dosing of NaOH

if there is no tube located.

Universal adapter  for MACRO (Ø 42  mm)   and  MICRO (Ø 26 mm)distillation tubes. Space  saving in the laboratory: the reservoirs for the H2O, NaOH, Boric Acid and HCl are located inside the unit.

Empties the digestion/distillation tubes and the collector automatically.

Automatic stop when distillation is complete. Large  LCD display  of 20  x 4 characters. RS232 output to results printer.

      Main system made from stainless  steel with an ABS plastic front

SPECIFICATIONS

Measuring range: 0.2 to 200 mg Nitrogen. Nitrogen recovery:> 99.5%

Distillation speed:  from 35 to 45 ml/minute

Coolant water consumption: 80 to 100 litres per hour. Steam generator water consumption: 2.5 Litre/ Hr. Steam generator water reservoir capacity: 6 litres. NaOH reservoir capacity: 2 Litres.

Boric Acid reservoir capacity: 2 Litres. Titrant reagent reservoir capacity: 2 Litres. Evaluation precision: 1.5%

Minimum reagent dose 0.01ml.

ALARMS

Low water  level for the steam generator.

Safety door open or no distillation/digestion tube in place. Steam generator over temperature.

AUTOMATION

Closing and opening of the condenser  cooling water  in line with the distillation process. Dosing of Boric Acid.

Dosing of NaOH once  the  distillation  has  started. Select  NaOH and  Boric Acid volume.

«On-line» evaluation of distillate.

Auto detection  of the end of the distillation process. Special functions to maximise performance.

Special functions for maintenance.

REAGENTS

All the reagents used in the «PRO-NITRO A» are  easily  located:

- Solution of 30-40% NaOH.

- Solution of Boric Acid at 1% concentration ( approx.) with mixed indicators

(Bromo-cresol green and methyl red).

- Reagent for titration: HCl or H2SO4 from 0.05N or 0.25N adjusted  to 0.001 Normal.