A molar absorbtivity database is a collection of data that lists the molar absorbtivity values for different substances. Molar absorbtivity, also known as molar extinction coefficient, is a measure of how strongly a substance absorbs light at a specific wavelength. This database is often used in spectroscopy and other analytical techniques to identify and quantify substances in a sample.
Molar absorbtivity is measured by determining the absorbance of a substance at a specific wavelength and concentration, and then using the Beer-Lambert law to calculate the molar absorbtivity value. The absorbance is measured using a spectrophotometer, which measures the amount of light that is absorbed by the substance at a specific wavelength.
A molar absorbtivity database is important for scientists and researchers as it provides a standardized reference for the molar absorbtivity values of different substances. This allows for more accurate and reliable measurements, comparisons, and predictions in various fields such as chemistry, biochemistry, and environmental science.
Molar absorbtivity values can vary depending on factors such as temperature, solvent, and concentration. Therefore, molar absorbtivity databases are regularly updated to include new and more accurate data. The frequency of updates can vary depending on the database, but it is typically done at least once a year.
Yes, there are several molar absorbtivity databases available online that can be accessed for free. Some of these databases are specific to certain substances or wavelengths, while others are more comprehensive and cover a wide range of substances. It is important to ensure that the database is reliable and regularly updated before using it for research or analysis purposes.