KBr, or potassium bromide, is commonly used as a sample holder in various analytical techniques.
However, it comes with several disadvantages that can impact the accuracy and efficiency of your analysis.
Here are the key drawbacks to consider when using KBr as a sample holder.
What are the 6 Disadvantages of KBr?
1. Hygroscopic Nature
KBr has a tendency to absorb moisture from the air.
This can affect the accuracy and reliability of the sample analysis, especially in techniques like FTIR (Fourier Transform Infrared Spectroscopy).
2. Fragility
KBr pellets can be easily broken, particularly during the process of making the pellets.
This can lead to loss of the sample and the need for additional time and resources to prepare new pellets.
3. Time-Consuming Process
Creating KBr pellets can be a time-consuming process, especially when using hand presses.
This can be a significant drawback when large quantities of pellets need to be prepared.
4. Large Amount of Reagent Required
The preparation of KBr pellets typically requires a relatively large amount of pure KBr reagent.
This can be costly, especially when working with expensive or limited samples.
5. Special Equipment Needed
To prepare KBr pellets, a special hydraulic press machine is often required.
This can add to the cost and complexity of the analysis process.
6. Limited Storage Capability
Hand-operated presses, commonly used for KBr pellet preparation, may not be suitable for creating samples that can be stored for future reference.
This can be a disadvantage when long-term sample storage is necessary.
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