ATR application to granular gum by auto-contact ATR accessory for VIR-100/200/300

In IR spectrometry, the ATR method has been applied to obtain the surface information of sample by contacting the sample with crystal. Most of commercially available ATR accessories allow the users to work on the sample contact with crystal only manually, while Jasco has developed the autocontact ATR including auto drive mechanism to contact the sample with ATR crystal. In the auto contact ATR, the contact pressure among crystal and sample can be controlled with good reproducibility. Such capability has been applied to the measurement of brittle sample or Jasco has simulated an acceptance inspection by using this auto contact ATR with “judgment of acceptance” function that is the one of the standard functions in VIR unit.

In this application note, the auto contact ATR has been applied to the monitoring of spectral change by changing of number of contact with sample such as granular gum.