The term symbols of allowed excited states of the Co 2 + ion with 4 F 9 / 2 electronic ground state are to be stated. Concept introduction: A term symbol describes the orbital, spin and total angular momenta of an electronic state. The symbol L represents the vector sum of orbital angular momentum . The symbol S represents the vector sum of spin angular momentum. The symbol J represents the total angular momentum. Therefore, the term symbol is represented as given below. 2 S + 1 L J

Question

In an effort to reduce costs and increase the accessibility of instruments that utilize spectrophotometric detection, some researchers are beginning to experiment with 3D-printed parts. One example of this is the 3D-printed flow cell, shown at right. This device was made using polylactic acid and accommodates a LED at one end and a detector at the other. It can be used for standalone flow injection spectrophotometry or coupled to a chromatographic separation to be used as a detector. Explain why the sensitivity varies with the length of the flow cell, as shown in the data below. Could this setup be used for fluorescence analysis? Why or why not?

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Question

Chapter 15, Problem 15.28E

Interpretation Introduction

Interpretation:

The term symbols of allowed excited states of the Co2+ ion with 4F9/2 electronic ground state are to be stated.

Concept introduction:

A term symbol describes the orbital, spin and total angular momenta of an electronic state. The symbol L represents the vector sum of orbital angular momentum. The symbol S represents the vector sum of spin angular momentum. The symbol J represents the total angular momentum. Therefore, the term symbol is represented as given below.

2S+1LJ

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In an effort to reduce costs and increase the accessibility of instruments that utilize spectrophotometric detection, some researchers are beginning to experiment with 3D-printed parts. One example of this is the 3D-printed flow cell, shown at right. This device was made using polylactic acid and accommodates a LED at one end and a detector at the other. It can be used for standalone flow injection spectrophotometry or coupled to a chromatographic separation to be used as a detector. Explain why the sensitivity varies with the length of the flow cell, as shown in the data below. Could this setup be used for fluorescence analysis? Why or why not?

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