Statistical Estimation of Linear Calibration Range
作者:
L. Cuadros Rodríguez,
A.M. García Campaña,
J.M. Bosque Sendra,
期刊:
Analytical Letters
(Taylor Available online 1996)
卷期:
Volume 29,
issue 7
页码: 1231-1239
ISSN:0003-2719
年代: 1996
DOI:10.1080/00032719608001471
出版商: Taylor & Francis Group
关键词: Linearity;Goodness-of-fit;Lack-of-fit;Precision;Linear range
数据来源: Taylor
摘要:
The “in-line” and “on-line” linearity terms of a linear calibration are defined. “On-line” linearity, which is calculated from the standard deviation of the slope, is proposed as a performance characteristic for the analytical method. The relation between the precision of an analytical result, and the analytical sensitivity and “on-line” linearity of the corresponding chemical calibration is established. The simplified equation that is obtained makes it possible to rapidly estimate the standard deviation with a sufficient degree of freedom, even when few analysis replicates are available. An indication is also given of the suitable equation for a more accurate calculation. The use of the two linearities, both “in-line” and “on-line”, is discussed, concerning the determination of the linear calibration range, for those techniques with which curvatures are obtained when the concentration of the standard analyte exceeds a particular value.
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