### 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-K_{2}Cr_{2}O_{7} 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 |
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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

### Cite this

*Journal of Analytical Chemistry*,

*52*(6), 508-513.

**Linear regression analysis of potentiometric titration data for asymmetric redox reactions.** / Mar'yanov, B. M.; Gavrilenko, M. A.

Research output: Contribution to journal › Article

*Journal of Analytical Chemistry*, vol. 52, no. 6, pp. 508-513.

}

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 -