Abstract
A statistical method is proposed for treating potentiometric titration curves for homogeneous asymmetric redox reactions. The method is based on the use of a mathematical model for the transformation of the branch of a titration curve in the region of potentials of a reversible redox couple into a linear regression characteristic whose slope numerically coincides with the equivalent titrant volume to an accuracy of the LS estimation. The method was verified in the model titrimetric system Mohr's salt-K2Cr2O7 and used for determining tellurium in an individual solution, in a semiconductor CdTe alloy, and in a CdTe ceramic. The random error in the estimation of the equivalence point by the data of a separate titration of 0.1-0.01 M solutions does not exceed 0.3%. In the case of titration of a 0.001 M solution, this error increases to 1.2%. The value of RSD varies from 0.06 to 0.7%.
| Original language | English |
|---|---|
| Pages (from-to) | 508-513 |
| Number of pages | 6 |
| Journal | Journal of Analytical Chemistry |
| Volume | 52 |
| Issue number | 6 |
| Publication status | Published - Jun 1997 |
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ASJC Scopus subject areas
- Analytical Chemistry
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Linear regression analysis of potentiometric titration data for asymmetric redox reactions. / Mar'yanov, B. M.; Gavrilenko, M. A.
In: Journal of Analytical Chemistry, Vol. 52, No. 6, 06.1997, p. 508-513.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Linear regression analysis of potentiometric titration data for asymmetric redox reactions
AU - Mar'yanov, B. M.
AU - Gavrilenko, M. A.
PY - 1997/6
Y1 - 1997/6
N2 - A statistical method is proposed for treating potentiometric titration curves for homogeneous asymmetric redox reactions. The method is based on the use of a mathematical model for the transformation of the branch of a titration curve in the region of potentials of a reversible redox couple into a linear regression characteristic whose slope numerically coincides with the equivalent titrant volume to an accuracy of the LS estimation. The method was verified in the model titrimetric system Mohr's salt-K2Cr2O7 and used for determining tellurium in an individual solution, in a semiconductor CdTe alloy, and in a CdTe ceramic. The random error in the estimation of the equivalence point by the data of a separate titration of 0.1-0.01 M solutions does not exceed 0.3%. In the case of titration of a 0.001 M solution, this error increases to 1.2%. The value of RSD varies from 0.06 to 0.7%.
AB - A statistical method is proposed for treating potentiometric titration curves for homogeneous asymmetric redox reactions. The method is based on the use of a mathematical model for the transformation of the branch of a titration curve in the region of potentials of a reversible redox couple into a linear regression characteristic whose slope numerically coincides with the equivalent titrant volume to an accuracy of the LS estimation. The method was verified in the model titrimetric system Mohr's salt-K2Cr2O7 and used for determining tellurium in an individual solution, in a semiconductor CdTe alloy, and in a CdTe ceramic. The random error in the estimation of the equivalence point by the data of a separate titration of 0.1-0.01 M solutions does not exceed 0.3%. In the case of titration of a 0.001 M solution, this error increases to 1.2%. The value of RSD varies from 0.06 to 0.7%.
UR - http://www.scopus.com/inward/record.url?scp=27644542822&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27644542822&partnerID=8YFLogxK
M3 - Article
VL - 52
SP - 508
EP - 513
JO - Journal of Analytical Chemistry
JF - Journal of Analytical Chemistry
SN - 1061-9348
IS - 6
ER -