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DSC 204 F1 Phoenix® -
Application Example µSensor

 

 
New µ-Sensor Technique for DSC 204 F1 Phoenix®
 
Offering both outstanding sensitivity and excellent resolution simultaneously, the µ-Sensor guarantees comprehensive measurement results, especially if only a small sample mass is available. This newly developed sensor which works in a temperature range from -150 to 400°C is ideal for pharmaceuticals, biomaterials and foods.
 
For demonstrating the high signal-to-noise ratio of the new µ-Sensor, 0.27 mg of 4,4'-azoxyanisole were measured in a closed standard aluminum crucible at a heating rate of 1 K/min according to the sensitivity test in [1]. This substance shows two transitions: a large solid to liquid crystal transition at about 117°C and a much smaller liquid crystal to isotropic liquid transition at about 134°C. Fig. 1 illustrates the raw data with an endothermal peak of the second transition at 134.6°C with a peak height of 0.05 mW in comparison to a peak-to-peak noise of only 0.5 µW.
 
 
The high sensitivity and simultaneously excellent resolution of the µ-Sensor guarantees comprehensive measurement results even for diluted substances. Fig. 2 apart from the ice melting peak, a further peak at -1.7°C was detected for a 10% aqueous solution of a sugar alcohol. The presentation shows the enlarged scaling of this effect confirming the extremely low noise level (sample mass: 3.6 mg, heating rate: 1 K/min).
 

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NETZSCH offers precision thermal analysis instruments including advanced dilatometers (with a new basic R&D/QC dilatometer), classical DSC & TGA (with a new economical DSC), high temperature DSC to 1650°C for specific heat, very high temperature STA (TGA-DSC/DTA) to 2400°C (featuring the new STA 409-PC Luxx®), thermal / evolved gas analysis with fully-integrated FTIR & MS, plus high resolution TMA and DMA. We also feature leading technology for thermal conductivity and diffusivity measurement as well as refractories testing including HMOR, CIC, and RUL.

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Last update: 05/25/2008 , Copyright © 2000-2006 NETZSCH-Geraetebau GmbH