Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
Question
Book Icon
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-

Rc=RxRb …….. (1)

Where,

Rc = correcting counting rate

Rx = counting rate for sample

Rb = counting rate for background

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 σR for the corrected counting rate is to be determined.

Concept introduction:

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

σRc=Rxtx+Rbtb

Where,

Rx = counting rate for sample

Rb = counting rate for background

tx = time required for counting rate for sample

tb = time required for counting rate for background

σRc = standard deviation for the corrected counting rate

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-

R=R±zσR

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

σRc=Rxtx+Rbtb

Where,

Rx = counting rate for sample

Rb = counting rate for background

tx = time required for counting rate for sample

tb = time required for counting rate for background

σRc = standard deviation for the corrected counting rate

Rc=RxRb

Blurred answer
Students have asked these similar questions
An isotope dilution experiment was performed to determine the chloride content in a given samples. 5 mg of sodium chloride containing 38 Cl (t ½ = 37.3 min) was added to the unknown samples. The specific activity of the added NaCl was 4.0 × 104 cps/mg. What was the total amount of chloride in the original sample if 400 mg of pure AgCl was isolated and if this material has a count rate of 35 cps above background 148 min after addition of radiotracer.   ( deeply explain all point of question and give deeply answer).
What is the process of elution in extracting Ba-137 from the Isotope Generator (2-3 sentences would do
For intitial radioactivity, 1 is the highest and 4 is the lowest
Knowledge Booster
Background pattern image
Similar questions
Recommended textbooks for you
Text book image
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Text book image
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning