Chapter 5, Problem 5.31P

Interpretation Introduction

Interpretation:

The concentration of DDT in the unknown has to be calculated.

Concept Introduction:

Response factor,

In chromatography, a response factor is well-defined as the proportion between the concentration of a compound being analyzed and the response of the detector to that compound.

$\frac{\text{signal from analyte}}{\text{concentration}\text{of}\text{analyte}}\text{=F}\left(\frac{\text{signal from standard}}{\text{concentration}\text{of}\text{standard}}\right)$

$\frac{{\text{A}}_{\text{X}}}{\left[\text{X}\right]}\text{=F}\left(\frac{{\text{A}}_{\text{S}}}{\left[\text{S}\right]}\right)$

$\begin{array}{l}\text{where,}\\ {\text{A}}_{\text{X}}\text{=signal}\text{from}\text{analyte}\\ \left[\text{X}\right]\text{=concentration}\text{of}\text{analyte}\\ \text{F=}\text{response}\text{factor}\\ {\text{A}}_{\text{S}}\text{=signal from}\text{standard}\\ \left[\text{S}\right]\text{=}\text{Concentration}\text{of}\text{standard}\end{array}$

The concentration of $\text{S}$,

$\left[\text{S}\right]\text{=initial}\text{concentration×dilution}\text{factor}$