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Optimization of sample packing in diffuse reflectance infrared spectroscopy |
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| Affiliation: | 1. School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA;2. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA;1. S.I. Vavilov State Optical Institute, 192171 Saint Petersburg, Russia;2. D.V. Efremov Institute of Electrophysical Apparatus, 196641 Saint Petersburg, Russia |
| Abstract: | Parameters of sample packing in diffuse reflectance IR Fourier transform spectroscopy (DRIFTS) have been investigated and optimized. One MPa pressure applied for 1 min was found to provide simultaneously at least ±3% reproducibility and appropriate band intensity. It has been also demonstrated that this precision can be obtained if the sample mass is controlled to ±2% and the sample is dry. A simple sample packing accessory was designed and constructed for reproducible sample preparation. Quartz concentration of dust samples has been determined and good agreement has been found with the results of the conventional pellet technique. |
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