Which type of sample preparation is commonly used before performing IR spectroscopy?

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Dissolving in water
KBr pellet method
Filtration
Evaporation

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Q: Which type of sample preparation is commonly used before performing IR spectroscopy?

Solution: The KBr pellet method is a common sample preparation technique for solid samples in IR spectroscopy, allowing for clear spectral analysis.

Steps: 7

Step 1: Understand that IR spectroscopy is a technique used to identify materials by measuring how they absorb infrared light.
Step 2: Know that solid samples need to be prepared in a specific way to get accurate results.
Step 3: Learn about the KBr pellet method, which is a common technique for preparing solid samples.
Step 4: In the KBr pellet method, the solid sample is mixed with potassium bromide (KBr) powder.
Step 5: The mixture is then pressed into a thin pellet using a special press.
Step 6: This pellet is placed in the IR spectrometer for analysis.
Step 7: The KBr pellet allows infrared light to pass through easily, giving clear results.

Which type of sample preparation is commonly used before performing IR spectroscopy?

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