Question 3 [10] 3.1. (i) Describe the differences between a linear ToF mass spectrometer and an orthogonal ToF instrument. (ii) What are the advantages and limitations of these two geometries? (2) (3) (3) 3.2. Describe three ways of introducing a sample into an ICP torch. 3.3. A chromatogram of a mixture of compound X and Y provided the following data (see Table 3.1): Table 3.1: Chromatographic data for U and V 3 Retention time (min) Peak width (at base) Mobile phase peak 0.81 0.01 Compound X 9.35 Compound Y 10.76 1.13 1.19 (i) For compound X, calculate (correct to 3 sig figs) its retention factor. (1) (ii) Calculate (correct to 3 sig figs) the selectivity factor for compound X and Y. (1)

Question 3 [10] 3.1. (i) Describe the differences between a linear ToF mass spectrometer and an orthogonal ToF instrument. (ii) What are the advantages and limitations of these two geometries? (2) (3) (3) 3.2. Describe three ways of introducing a sample into an ICP torch. 3.3. A chromatogram of a mixture of compound X and Y provided the following data (see Table 3.1): Table 3.1: Chromatographic data for U and V 3 Retention time (min) Peak width (at base) Mobile phase peak 0.81 0.01 Compound X 9.35 Compound Y 10.76 1.13 1.19 (i) For compound X, calculate (correct to 3 sig figs) its retention factor. (1) (ii) Calculate (correct to 3 sig figs) the selectivity factor for compound X and Y. (1)

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter28: High-performance Liquid Chromatography

Section: Chapter Questions

Problem 28.17QAP: Mass spectrometry is an extremely versatile detection system for GC. However, interfacing an HPLC...

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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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