The uncertainty of a result from a linear calibration | Zendy

David Brynn Hibbert | Zendy

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The uncertainty of a result from a linear calibration

Author(s) -

David Brynn Hibbert

Publication year - 2006

Publication title -

the analyst

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 153

eISSN - 1364-5528

pISSN - 0003-2654

DOI - 10.1039/b615398d

Subject(s) - calibration , repeatability , standard error , linear regression , quadratic equation , mathematics , function (biology) , statistics , line (geometry) , geometry , evolutionary biology , biology

The standard error of a result obtained from a straight line calibration is given by a well known ISO-endorsed expression. Its derivation and use are explained and the approach is extended for any function that is linear in the coefficients, with an example of a weighted quadratic calibration in ICPAES. When calculating the standard error of an estimate, if QC data is available it is recommended to use the repeatability of the instrumental response, rather than the standard error of the regression, in the equation.

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