FTIR (Fourier-transform infrared) spectroscopy is an analytical technique used to determine a sample's molecular structure. This method involves the measurement of how infrared radiation interacts with the sample, which can provide detailed information about the chemical bonds and functional groups present in the sample.
Sample Preparation and Measurement Methods: FTIR analysis typically requires the preparation of a sample into a form suitable for infrared spectroscopy. One common method involves diluting the sample in a material such as potassium bromide (KBr) and then using a hydraulic press to condense it into a solid pellet. This KBr pellet method is suitable for powder samples and is one of the classical methods used in FTIR.
With the advancement of FTIR technology, other methods have also become popular, such as the diffuse reflection method and attenuated total reflection (ATR) method. The diffuse reflection method is widely used for powder samples and involves measuring the light that is scattered back from the sample. ATR, on the other hand, allows direct measurement of powder samples by placing the sample in contact with a crystal and measuring the radiation that penetrates the surface of the sample.
Applications and Advantages: FTIR spectroscopy is versatile and can be used for a wide range of applications, including quality control, material analysis, and chemical identification. It is particularly useful for analyzing the chemical composition of materials, as it can detect elements from potassium to uranium with a content range from 1ppm to 99.99%.
The technique is known for its speed and efficiency, providing results in seconds, which is beneficial for mass production and 100% quality control of processed products. Additionally, FTIR instruments are designed to be rugged and suitable for various environments, making them ideal for industrial settings.
Data Management: FTIR instruments are equipped with advanced data acquisition and processing software that allows for effective management of real-time online inspection data. This includes the ability to connect the instrument to a PC remotely for real-time monitoring, enhancing the utility and efficiency of the analysis process.
In summary, FTIR reads the molecular structure of a sample by analyzing how it interacts with infrared radiation. This technique is versatile, fast, and provides detailed chemical information, making it a valuable tool in various scientific and industrial applications.
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