mixture of three components is separated using paper chromatography, and each component is analyzed using absorption. With tandards containing 100 ppm of each component run simultaneously, the following data were obtained: cmpd A, 0.72 absorbance 3, 0.55; C, 0.80. For the unknown mixture, the data obtined when run under identical conditions were as follows: cmpd A, .0.15 bsorbance, B, 0.84; C, 0.75. ) Calculate the relative percentage composition of the unknown mixture.

mixture of three components is separated using paper chromatography, and each component is analyzed using absorption. With tandards containing 100 ppm of each component run simultaneously, the following data were obtained: cmpd A, 0.72 absorbance 3, 0.55; C, 0.80. For the unknown mixture, the data obtined when run under identical conditions were as follows: cmpd A, .0.15 bsorbance, B, 0.84; C, 0.75. ) Calculate the relative percentage composition of the unknown mixture.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter28: Atomic Spectroscopy

Section: Chapter Questions

Problem 28.15QAP

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Mass spectrometry is an extremely versatile detection system for GC. However, interfacing an HPLC system to a mass spectrometer is a much more difficult task. Describe the major reasons why it is more difficult to combine HPLC with mass spectrometry than it is to combine GC with mass spectrometry.
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A mixture of three components is separated using paper chromatography, and each component is analyzed using absorption. With standards containing 100 ppm of each component run simultaneously, the following data were obtained: cmpd A, 0.72 absorbance; B, 0.55; C, 0.80. For the unknown mixture, the data obtined when run under identical conditions were as follows: cmpd A, 0.15 absorbance, B, 0.84; C, 0.75. a) Calculate the relative percentage composition of the unknown mixture. b) The distances traveled by the three components were 8.5, 6.3, and 5.5 cm, respectively. Sketch the appearance of the paper chromatogram. Label each spot. c) Calculate the Rf values if the solvent front is 18 cm.
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