None To a sample of a protein hydroysate, an analyst added 1.00 mg of tryptophan, which was labeled with 14C and exhibiteda counting rate of 584 cpm above background. The labeled compound was thoroughly mixed with the sample and themixture was passed through an ion-exchange column. The fraction effluent contaning only tryptophan was collected,and from it an 18.0 mg sample of pure tryptophan was isolated. The isolated sample had a counting rate of 204 cpm inthe same counter. What was the weight of tryptophan in the original sample?A. 6.28 mgB. 20.8 mgC. 50.5 mgD. 58.4 mgHelp me! Why is C correct. Please explain! Thank you.

To solve this problem, we need to use the concept of radioisotope dilution. The added radiolabeled…

Answered: To a sample of a protein hydroysate, an…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.20QAP

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