In UV-Vis spectroscopy, what does a peak at 260 nm typically indicate?

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Question: In UV-Vis spectroscopy, what does a peak at 260 nm typically indicate?

Options:

Correct Answer: Presence of nucleic acids

Solution:

A peak at 260 nm in UV-Vis spectroscopy typically indicates the presence of nucleic acids, as they absorb light at this wavelength.

In UV-Vis spectroscopy, what does a peak at 260 nm typically indicate?

In UV-Vis spectroscopy, what does a peak at 260 nm typically indicate?

Step 1: Understand what UV-Vis spectroscopy is. It is a technique used to measure how much light is absorbed by a sample at different wavelengths.
Step 2: Know that different substances absorb light at specific wavelengths. This helps identify what is in the sample.
Step 3: Recognize that nucleic acids, like DNA and RNA, have a characteristic absorption peak.
Step 4: Learn that nucleic acids typically absorb light at a wavelength of 260 nm.
Step 5: Conclude that if you see a peak at 260 nm in your UV-Vis spectrum, it usually means that nucleic acids are present in the sample.

UV-Vis Spectroscopy – A technique used to measure the absorbance of light by a sample at different wavelengths, which can indicate the presence of specific compounds.
Nucleic Acids Absorption – Nucleic acids, such as DNA and RNA, have characteristic absorbance peaks, with 260 nm being a key wavelength for their detection.