Heated Single-Reflection ATR Overview
ATR PRO 670H-S is a heated single-reflection. This ATR meets the demand for measuring changes with ATR while gradually applying temperature to the sample.
Maximum Heating Temperature /Corresponding Prism
With the ATR PRO670H-S, you can select from three types of prisms, and the maximum heating temperature depends on the prism.
| Prism | Maximum Heating Temperatures |
| ZnSe | 120℃ |
| Ge | 150℃ |
| Diamond | 180℃ |
For example, diamond can be measured while heating up to 180 °C.
Both prisms use the same high-efficiency type as that used for normal single-reflection ATR, enabling high-precision measurement even when using a TGS detector.
Measurement of Salad Oil at 180°C
The spectrum below is shown by measuring the degree of deterioration of salad oil at 180 ° C using ATR PRO 670H-S.
The cis – trans conversion of unsaturated fatty acids in fats and oils is observed with oxidative deterioration.
Therefore, the degree of deterioration can be investigated by observing the peaks derived from each.
350°C Heated ATR
This 350°C heated single-reflection ATR supports heating measurements up to 350°C and is more suitable for tracking sample melting, glass transition, etc.
The spectrum on the left tracks changes in the carbonyl group during PET heating.
By heating from room temperature to 350°C, it was possible to observe how the peak of the carbonyl group shifts to the high frequency side.
Figure 4 Tracking changes in carbonyl groups during PET heating
Heated Single-Reflection ATR Specifications
| ATR Prism | ZnSe, Ge, Diamond (670H-S) Diamond (690H-H) |  |
| ATR/Sample Contact Area | 1.5 mm diameter (ZnSe, Ge) 2.0 mm diameter (Diamond) |
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| No. of Reflections | 1 | |
| Angle of Incidence | 45° | |
| Pressure | 400 kg/cm2 (670H-S) 1,700 kg/cm2 (690H-H) |
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| Operating Temperature | 180°C (Diamond) 150°C (Ge) 120°C (ZnSe) |
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| * A connector panel is required when this accessory is fitted to the FT/IR-6000FV. | ||