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ChemistryPrinciples of Instrumental Analysis(a) Interpretation: The total counting rate for sample is 450cpm (sample plus background) and the counting period for this rate is 15.0min. The counting rate for background is 7 cpm for time period 2.0 min. The value of corrected counting rate is to be determined. Concept introduction: The following formula will be used for the corrected counting rate- R c = R x − R b …….. (1) Where, R c = correcting counting rate R x = counting rate for sample R b = counting rate for backgroundStart your trial now! First week only $4.99!*arrow_forward*

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7th Edition

Douglas A. Skoog + 2 others

Publisher: Cengage Learning

ISBN: 9781305577213

Chapter 32, Problem 32.7QAP

Interpretation Introduction

**(a)**

**Interpretation:**

The total counting rate for sample is 450cpm (sample plus background) and the counting period for this rate is 15.0min. The counting rate for background is 7 cpm for time period 2.0 min. The value of corrected counting rate is to be determined.

**Concept introduction:**

The following formula will be used for the corrected counting rate-

Where,

Interpretation Introduction

**(b)**

**Interpretation:**

The total counting rate for sample is 450cpm (sample plus background) and the counting period for this rate is 15.0min. The counting rate for the background is 7 cpm for time period 2.0 min. The value of standard deviation

**Concept introduction:**

The formula used for the calculation of standard deviation for the corrected counting rate is-

Where,

Interpretation Introduction

**(c)**

**Interpretation:**

The total counting rate for sample is 450cpm (sample plus background) and the counting period for this rate is 15.0min. The counting rate for background is 7 cpm for time period 2.0 min. The value of 95% confidence interval for the corrected counting rate is to be determined.

**Concept introduction:**

The formula that will be used-

The formula used for the calculation of standard deviation for the corrected counting rate is-

Where,