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Features | Terahertz spectrometer
・Integrated prism ensures there are no effects from water vapor in the environment
This product does not require nitrogen purging that is usually needed in other products to remove effects of water vapor on terahertz waves.
・Excellent stability
Superb stability allows continuous measurements with high reproducibility.
・Compact and space-saving
The control section is integrated into the main unit, so just connecting a notebook computer to the main unit allows remote operation. No other equipment is needed.
・Liquid can be measured
Since liquid will likely absorb terahertz waves it is difficult to measure liquid by the normal transmission method. However, liquids can be successfully measured by attenuated total reflection spectroscopy.
・No preparation required for powder samples
Measuring powder using terahertz waves usually requires compressing the powder into a tablet shape but is totally unnecessary for this product.
Continuous measurement mode
In continuous measurement mode, continuous data can be obtained and output at specific time intervals. This mode is useful for observing changes over time in the sample being measured to ensure obtaining stable results over a long period of time.
The graph on the right side shows relative changes in the absorption coefficient at a particular frequency. This data was measured using continuous measurement mode for consecutive 9 days with water placed on the measurement surface. The results show that stable measurements (error within±3 %) can be made over a long period of time.
＜Application examples＞
・Crystal precipitation and transition
・Deterioration evaluation
・Other changes over time
Comparison with other methods in crystallinity evaluation
| X-ray diffraction | Thermal analysis | Raman spectroscopy | Terahertz spectrometers | |
|---|---|---|---|---|
| Controlled area | Required | Not required | Not required | Not required |
Sample destroyed or not |
Not destroyed*1 | Destroyed | Not destroyed*1 | Not destroyed |
| Measurement time*2 | Several tens of minutes | Several tens of minutes | Several minutes | About 3 minutes |
Determination of crystalline state in liquid |
Impossible | Impossible | Impossible | Possible*3 |
*1 Samples may be damaged depending on measurement conditions.
*2 Measurement time may vary depending on the sample condition and measurement conditions.
*3 Terahertz spectrometers are capable of determining without any additional treatment, whether or not the crystalline state has dissolved into the liquid.
- Confirmation
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