Chapter 5, Problem 5.18P

Interpretation Introduction

Interpretation:

For the given problem the mean percent recovery of the spike and concentration detection limit has to be calculated.

Concept Introduction:-

Spike is also called as fortification, is better known as the amount of analyte added to a sample to test whether the response to the spike is the equal as that predictable from a calibration curve.

Definition of spike recovery percentage is the difference between concentrations of spiked sample and unspiked samples by concentration added.

$\text{\%}\text{recovery}\text{=}\frac{{\text{C}}_{\text{spiked sample}}{\text{- C}}_{\text{unspiked sample}}}{{\text{C}}_{\text{added}}}\text{×100}$

Concentration detection limit:-

In analytical chemistry, concentration detection limit can be found 3 times the standard deviation

$\begin{array}{l}\text{concentration}\text{detection}\text{limit}\text{=}\text{3s}\\ \text{where}\text{s}\text{is}\text{standard}\text{deviation}\end{array}$