18 Questions
What is the principle of Raman spectroscopy?
Measuring the vibrational energy modes of molecules through scattered light
In which region of the spectrum is Infrared Spectroscopy typically performed?
Visible and Near-Infrared region
What is the type of spectroscopy that exploits the fluorescence effect?
Fluorescence Spectroscopy
What is the purpose of optical fibers or integrating spheres in spectrophotometers?
To put the samples in contact with the spectrophotometer
What is the general principle of spectroscopy?
Measuring the absorbance of the sample
What is the type of spectroscopy that is not mentioned in the text?
Impedance Spectroscopy
What type of sensor arrays monitor the process of chemical bonds creation?
Colorimetric
What is the principle behind impedance spectroscopy?
Evaluating the impedance Z from Ohm's law
What is the effect of the creation of chemical bonds on the substances in colorimetric sensor arrays?
Shift the absorption peak in the visible range
What is the main purpose of applying a magnetic field in NMR spectroscopy?
To excite the nuclei into resonance
What is the physical effect related to the presence of fluorophores in food samples?
Fluorescence
What is the main difference between colorimetric sensor arrays and colorimetric systems?
The subject of the investigation
What is the advantage of dielectric techniques in the radio frequency range?
They are fast and non-invasive
Which of the following spectroscopic techniques is used to detect microbial growth and spoilage?
Hyperspectral imaging
What is the purpose of using an array of different dyes in colorimetric sensor arrays?
To monitor several chemical substances at the same time
What is the range of electromagnetic waves used in optical spectroscopic techniques?
UV, VIS, and IR ranges
What is the focus of colorimetric systems in analyzing the samples?
Changes in the whole sample
Which of the following spectroscopic techniques is used to analyze the molecular structure of food samples?
Infrared spectroscopy
Explore the principles of fluorescence spectroscopy, its applications, and the techniques employed. Learn about the use of infrared spectroscopy in food analysis, particularly in the near-infrared and visible region. Test your knowledge on the instrumentation and methods used in these spectroscopic techniques.
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