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To preconcentrate cocaine and benzoylecgonine from river water at the opening of this

Quantitative Chemical Analysis | 8th Edition | ISBN: 9781429218153 | Authors: Daniel C. Harris ISBN: 9781429218153 475

Solution for problem 27-15 Chapter 44

Quantitative Chemical Analysis | 8th Edition

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Quantitative Chemical Analysis | 8th Edition | ISBN: 9781429218153 | Authors: Daniel C. Harris

Quantitative Chemical Analysis | 8th Edition

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Problem 27-15

To preconcentrate cocaine and benzoylecgonine from river water at the opening of this chapter, solid-phase extraction was carried out at pH 2 using the mixed-mode cation-exchange resin in Figure 27-18. After passing 500 mL of river water through 60 mg of resin, the retained analytes were eluted first with 2 mL of CH3OH and then with 2 mL of 2% ammonia solution in CH3OH. Explain the purpose of using pH 2 for retention and dilute ammonia for elution.

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CH​ ​ 01 6​ ​September​ ​2017 *First​ ​test​ ​9/14* CHAPTER​ ​2 GOAL:​ U​ nderstand​ ​how​ e ​ lectrons​ ​are​​ rranged​ i​n atoms Major​ ​Topics: - Light​ ​and​ ​Matter - Waves​ ​and​ ​Particles - Atomic​ ​Structures - Quantum​ M ​ echanics SOME​ ​BACKGROUND:​ L ​ IGHT Light​ ​is​ ​​ lectromagnetic​ ​wave.​ ​It’s​​ ​ ​field​ ​that is​​ ropagating​ ​through​ ​space​ ​and​ o​ scillates​ ​regularly which​ ​are​ ​qualities​ ​of​ ​a​ ​wave.​ ​The​ ​wave​ ​does​ ​not​ ​move up​ ​ nd​ ​down​ ​but​ he​ ​magnitude​ o​ f​ ​th​ ave. Speed​ ​of​ ​light​ ​is​ ​3.00*10​ /sm Wavelength​ ​varies​ ​while​ ​the​​ peed​ ​ f​ ​light​ ​stays constant.​ ​Wavelength​ ​is​ ​the​ ​length​ ​from​ ne​​ mplitude maximum​

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Chapter 44, Problem 27-15 is Solved
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Textbook: Quantitative Chemical Analysis
Edition: 8
Author: Daniel C. Harris
ISBN: 9781429218153

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