A 50.0 mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a volume of 150.0 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured as 164 on an arbitrary scale. Under similar conditions, a 25.0 ppm standard quinine solution had a fluorescence intensity of 197. Calculate the mass of quinine in the original tonic water sample. mass: mg

A 50.0 mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a volume of 150.0 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured as 164 on an arbitrary scale. Under similar conditions, a 25.0 ppm standard quinine solution had a fluorescence intensity of 197. Calculate the mass of quinine in the original tonic water sample. mass: mg

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

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A 50.0 mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a
volume of 150.0 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured as 164 on an arbitrary scale.
Under similar conditions, a 25.0 ppm standard quinine solution had a fluorescence intensity of 197. Calculate the mass of
quinine in the original tonic water sample.
mass:
mg

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