Q31P (a) Explain the purpose of the d... [FREE SOLUTION]

Chapter 21: Q31P (page 558)

(a) Explain the purpose of the dynamic reaction cell in Figure 21-30. (b) In geologic strontium isotopic analysis, there is isobaric interference between $^{87} R b^{+}$ and $^{87} S r^{+}$ . A dynamic reaction cell with $C H_{3} F$ converts to but does not convert $R b^{+}$ to $R b F^{+}$ . How does this reaction eliminate interference?

Short Answer

Expert verified

(a) A dynamic reaction cell reduces isobaric interference by performing a thermodynamically favourable reaction with a gas such as $N H_{3}, N_{2} O$ or $C O$ to remove interfering molecular ions like $A r O^{+}$ .

(b) When ${}^{87}S r^{+}$ reacts with $C H_{3} F$ to generate ${}^{87}S r {}^{19}F e$ , which has a mass of 106 , the mass spectrum does not overlap with ${}^{87}R b$ .

Step by step solution

Define isotopic interference.

Isotopic interference occurs when two isotopes in a sample solution have the same mass but are from different elements.

Explain the elimination of the interference in the given reaction.

(a)

A dynamic reaction cell reduces isobaric interference by performing a thermodynamically favourable reaction with a gas such as $N H_{3}, N_{2} O$ or $C O$ to remove interfering molecular ions like $A r O^{+}$ or convert analyte into a molecular ion that can be detected without interference.

(b)

When ${}^{87}S r^{+}$ reacts with $C H_{3} F$ to generate ${}^{87}S r {}^{19}F e$ , which has a mass of 106 , the mass spectrum does not overlap with .

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Short Answer

Step by step solution

Define isotopic interference.

Explain the elimination of the interference in the given reaction.

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91影视

(a) Explain the purpose of the dynamic reaction cell in Figure 21-30. (b) In geologic strontium isotopic analysis, there is isobaric interference between87Rb+and87Sr+ . A dynamic reaction cell with CH3Fconverts to but does not convertRb+ toRbF+ . How does this reaction eliminate interference?

Short Answer

Step by step solution

Define isotopic interference.

Explain the elimination of the interference in the given reaction.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Chemistry Branches

Making Measurements

Chemical Analysis

The Earths Atmosphere

Nuclear Chemistry

Kinetics

Study anywhere. Anytime. Across all devices.