Classify the statements based on whether they describe the method of standard addition, the method of external calibration, or both. Ⓒ Macmillan LearningClassify the statements based on whether they describe the method of standard addition, the method of external calibration,or both.Standard additionKnown quantities of a standard solution ofthe analyte are added to the unknown.It is the method of choice when the matrix ofthe sample may affect the signal.External calibrationIt consists of a series of standard analytesolutions separate from the unknown.Matrix effects can cause the same analyteconcentration in an unknown and standard togive different responses.The response of the instrument must be linearin the sample matrix.BothIt is used to measure the instrument responseas a function of a known analyteconcentration under a set of conditions.A blank is used to correct the response fromthe instrument.Systematic errors can occur due to sample orstandard preparation.

Because the standard specimen and the sample are combined before the equipment reaction is measured,…

Answered: Classify the statements based on…

Classify the statements based on whether they describe the method of standard addition, the method of external calibration, or both.

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter14: Chromatography

Section: Chapter Questions

Problem 1P

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Question

Classify the statements based on whether they describe the method of standard addition, the method of external calibration, or both.

Ⓒ Macmillan Learning
Classify the statements based on whether they describe the method of standard addition, the method of external calibration,
or both.
Standard addition
Known quantities of a standard solution of
the analyte are added to the unknown.
It is the method of choice when the matrix of
the sample may affect the signal.
External calibration
It consists of a series of standard analyte
solutions separate from the unknown.
Matrix effects can cause the same analyte
concentration in an unknown and standard to
give different responses.
The response of the instrument must be linear
in the sample matrix.
Both
It is used to measure the instrument response
as a function of a known analyte
concentration under a set of conditions.
A blank is used to correct the response from
the instrument.
Systematic errors can occur due to sample or
standard preparation.

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