PrepASH 340 series

... is the latest in the new generation of thermo-gravimetric analysis instruments.
It determines moisture and ash values automatically and produces up to 80% savings in workload and costs. The prepASH provides higher precision and reproducibility of the results through considerable improvements of manual procedures. This is an instrument where no technology transfer data loss occurs and where the entire process is monitored and recorded from start to finish.
In one working cycle, up to 29 specimens and a reference pan are ashed fully automatically in accordance with the latest quality guidelines, monitored and recorded within a wide temperature range of 50 to 1000C. Safety and reliability in the storage of fundamental data and operating parameters are guaranteed.

Principle of Analysis:

The prepASH 340 series consists of a muffle furnace combined with an analytical balance and advanced software using a touch-screen user interface. Weighing curves are recorded over time for each individual test sample. This permits automatic end-point determination and control during the entirety of the drying and ashing process. No additional computer is needed.

Easy method development with prepASH

• 1. Definition of temperature profile
  Temperature curves can be individually configured and consist of more than 10 freely definable steps (ramping/holding). Temperatures can be set between 50C to 1000C. Combustion atmosphere can be varied by choosing the process gas (air, O2, N2).
• 2. Setup of the end-point determination
  The analysis is finished when all samples have reached a stable weight. The auto-stop criteria can be chosen from 0.1-9.9 mg per 1min, 30 min or 60min. Alternatively the analysis can be stopped at a fixed time.
• 3. Selection of results calculation
  The results are calculated as losses or residuals in respect of weighing-in or pre-interval values (e.g. dry mass). The user may choose between %, g/kg, g.

All parameters are saved as individual methods on the prepASH.

Efficient daily analysis in just a few Steps with prepASH

1st Step: Method selection and Weighing-in
Select the method for your analysis. Enter your IDs (Name or Number) for your samples and crucibles via the touch screen, keyboard or barcode reader. Place your crucibles (1 reference + up to 29 samples) into the turn-table and start the automatic tare cycle. Then start your weighing-in procedure by putting the samples into the crucibles.

2nd Step: Unassisted / Standalone Analysis
After the weighing-in has been completed simply press the start button to start your analysis of the selected method. Now the prepASH has started it will continue to measure the crucibles until each sample has reached the auto-stop criteria. At the end of the analysis the prepASH will give an acoustic signal, switch off the heating system, cool down and open the lid.

3rd Step: Report output
The prepASH is printing out a report according GMP/GLP onto your connected USB or network printer. The report shows all process parameters together with weight curves and the result of each sample. PC software prepDATA helps for extended data evaluation, online monitoring, statistics and report preparation.