Chapter 5, Problem 5.24P

a)

Interpretation Introduction

Interpretation:

The concentration of $\text{Sr}$ and its uncertainty in the $\text{10-mL}$ sample solution in the parts per billion= $\text{ng/mL}$ has to be find out.

Concept Introduction:

Standard additions to one solution:

The graph can be drawn using the equation

$\text{plot}\underset{\text{Function}\text{to}\text{plot}\text{on}\text{y-axis}}{\underbrace{{\text{I}}_{\text{S+X}}\left(\frac{\text{V}}{{\text{V}}_{\text{0}}}\right)}}\text{versus }{\text{I}}_{\text{X}}\text{+}\frac{{\text{I}}_{\text{X}}}{{\left[\text{X}\right]}_{\text{i}}}\underset{\text{function}\text{to}\text{plot}\text{on}\text{x-axis}}{\underbrace{{\left[\text{S}\right]}_{\text{i}}\left(\frac{{\text{V}}_{\text{S}}}{{\text{V}}_{\text{0}}}\right)}}$

Where X-intercept is ${\left[\text{X}\right]}_{\text{i}}$

b)

Interpretation Introduction

Interpretation:

The concentration of $\text{Sr}$ and its uncertainty in the $\text{10-mL}$ sample solution in the parts per million = $\text{μg/g}$ has to be find out.

Concept Introduction:

Concentration of $\text{Sr}\text{(ppm)}$

Concentration (ppm) = $\frac{\text{mass}\text{of}\text{Sr}}{\text{mass}\text{of}\text{enamel}}{\text{×10}}^{\text{6}}$

c)

Interpretation Introduction

Interpretation:

The uncertainty in the concentration of $\text{Sr}$ in tooth enamel in parts per million has to be find out.

d)

Interpretation Introduction

Interpretation:

The $\text{95\%}$ confidence interval for $\text{Sr}$ in tooth enamel has to be find out.