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Chapter 0: Q4P (page 9)

What is the purpose of a calibration curve?

Short Answer

Expert verified

A calibration curve is a graph of detector response vs analyte concentration.

Step by step solution

01

Definition of the calibration curve

A calibration curve, also called a standard curve, is a method for measuring the concentration of a drug in an unknown sample by comparing it to a series of known concentration standard samples.

02

Purpose of the calibration curve

  • On two distinct devices, the same material with the same concentration might sometimes produce different detection responses.
  • They employ calibration curves or standard curves to optimize their work and efficiency.
  • A calibration curve is a graph of detector response vs analyte concentration. That means we should examine a standard solution before using our sample (whose concentration is known).
  • The calibration curve is a graph that we may obtain from its analysis, and its aim is to provide us with a graph and detector response values that can be used as a reference value.
  • One can calibrate our method of analysis in order to obtain precise results by doing so.

Thus, A calibration curve is a graph of detector response vs analyte concentration.

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Most popular questions from this chapter

Consider the following equilibria in aqueous solution:

(1)Ag++Cl-鈬�AgCl(aq)鈥�K=2.0脳103

(2)AgCl(aq)+Cl-鈬�AgCl2-K=9.3脳101

(3)AgCl(s)鈬�Ag++Cl-鈥�K=1.8脳10-10)

(a) Calculate the numerical value of the equilibrium constant for the reactionAgCl(s)鈬�AgCl(aq).

(b) Calculate the concentration ofAgCl(aq)in equilibrium with excess undissolved solid AgCl.

(c) Find the numerical value ofKfor the reactionAgCl2-=AgCl(s)+Cl-

List the steps in a chemical analysis.

What does it mean to mask an interfering species?

The metal ion indicator xylenol orange (Table 12-3) is yellow atpH6(位max=439nm).The spectral changes that occur asVO2+is added to the indicator atpH6 are shown here. The mole ratioVO2+/xylenol orange at each point is


Suggest a sequence of chemical reactions to explain the spectral changes, especially the isosbestic points at457 and 528nm.

Absorption spectra for the reaction of xylenol orange withVO2+atpH 6.0

What color do you expect to observe for the cresol purple indicator (Table 11-3) at the following pH values?

(a)1.0;(b)2.0;(c)3.0.
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