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Optoacoustic Spectroscopy (CAT#: STEM-ST-0337-WXH)

Introduction

Photoacoustic spectroscopy measures the effect of electromagnetic radiation on an analyte sample through acoustic detection. The primary advantage of applying photoacoustic spectroscopy to solids is that no sample preparation is required. Moreover, because photoacoustic signals depend on absorbed light, this technique holds true, even for powders.




Principle

Photoacoustic spectroscopy (PAS) is the measurement of the effect of absorbed electromagnetic energy (particularly of light) on matter by means of acoustic detection. The absorbed energy from the light causes local heating and through thermal expansion a pressure wave or sound.

Applications

Detect and quantify chemical functional groups and thus chemical substances
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