Issue 9, 2023

A low-cost automated titration system for colorimetric endpoint detection

Abstract

An auto titrator system was developed to accurately and precisely detect colorimetric endpoints for spectrochemical titrations. This system was constructed using inexpensive components such as a Raspberry Pi® single-board computer, 3D-printed components, and a commercially available spectral sensor. The auto titrator was evaluated by performing a standard method for determination of water hardness. Regardless of analyst experience, the auto titrator performed better than the traditional titration approach that involves manual dosing of titrant and visual detection of the endpoint. Inter-day, intra-day, inter-instrumental, and intra-instrumental validation studies were performed to establish the accuracy and precision of endpoint detection. The auto titrator eliminates the subjective bias in color perception and produces accurate and precise endpoint results.

Graphical abstract: A low-cost automated titration system for colorimetric endpoint detection

Supplementary files

Article information

Article type
Paper
Submitted
27 Dec 2022
Accepted
04 Apr 2023
First published
06 Apr 2023

Analyst, 2023,148, 2133-2140

Author version available

A low-cost automated titration system for colorimetric endpoint detection

N. P. D. Boppana, R. Snow, P. S. Simone, G. L. Emmert and M. A. Brown, Analyst, 2023, 148, 2133 DOI: 10.1039/D2AN02086F

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