(a) Interpretation: The standard solution of methyl vinyl ketone results in the relative peak area of chromatograms which is shown below: Concentration MVK, mmol/L Relative Peak Area 0.500 3.76 1.50 9.16 2.50 15.03 3.50 20.42 4.50 25.33 5.50 31.97 The slope and the intercept of the least square line are to be determined. Concept introduction: The slope of a line is also known as a gradient of line which is used to define the direction and steepness of the line. The intercept line is the y-axis of a line at which point it crosses the X −axis.

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Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213
BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

Solutions

Chapter A1, Problem A1.24QAP
Interpretation Introduction

(a)

Interpretation:

The standard solution of methyl vinyl ketone results in the relative peak area of chromatograms which is shown below:

Concentration MVK, mmol/L Relative Peak Area
0.500 3.76
1.50 9.16
2.50 15.03
3.50 20.42
4.50 25.33
5.50 31.97

The slope and the intercept of the least square line are to be determined.

Concept introduction:

The slope of a line is also known as a gradient of line which is used to define the direction and steepness of the line.

The intercept line is the y-axis of a line at which point it crosses the X −axis.

Interpretation Introduction

(b)

Interpretation:

The graph for the least square line as well as experimental points is to be plotted.

Concept introduction:

The least-square method is a method in which the best result is obtained for the set data point by minimizing the sum of offset or residuals from the plot of curve statistically.

Interpretation Introduction

(c)

Interpretation:

The relative peak area of the sample containing MVK is 10.3. The concentration of MVK in the solution is to be determined.

Concept introduction:

The slope of a line is also known as a gradient of line which is used to define the direction and steepness of the line.

The intercept line is the y-axis of a line at which point it crosses the X −axis.

Interpretation Introduction

(d)

Interpretation:

It is considered that the result obtained from (d) is representing the single measurement as well as the mean of four measurements. The respective absolute and relative standard deviation is to be determined.

Concept introduction:

The standard deviation method is used for the quantification of the amount of variation or for the dispersion for the set of the data values.

Interpretation Introduction

(e)

Interpretation:

The calculation for the section (c) and (d) is to be repeated when the peak area of the sample is 22.8.

Concept introduction:

The standard deviation method is used for the quantification of the amount of variation or for the dispersion for the set of the data values.

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