A specific steroid has a max of 254 nm and a molar absorptivity & of 11, 500 L mol-¹ cm-¹. What is the concentration of the compound in a solution whose absorbance at 254 nm is A = 0.085 with a sample pathlength of 1.00 cm?

A specific steroid has a max of 254 nm and a molar absorptivity & of 11, 500 L mol-¹ cm-¹. What is the concentration of the compound in a solution whose absorbance at 254 nm is A = 0.085 with a sample pathlength of 1.00 cm?

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter14: Ultraviolet Spectroscopy, Refractive Indices, And Qualitative Instrumental Organic Analysis

Section: Chapter Questions

Problem 4Q

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Concept explainers

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.

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A specific steroid has a max of 254 nm and a molar absorptivity & of 11, 500 L mol-¹ cm-¹. What is the concentration of the
compound in a solution whose absorbance at 254 nm is A = 0.085 with a sample pathlength of 1.00 cm?

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A specific steroid has a λmax of 249 nm and a molar absorptivity ε of 11,500 L mol−1 cm–1. What is the concentration of the compound in a solution whose absorbance at 249 nm is A = 0.050 with a sample pathlength of 1.00 cm?