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Related Concept Videos

Controlled-Current Coulometry: Coulometric Titration01:18

Controlled-Current Coulometry: Coulometric Titration

Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...
Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
Potentiometric Titration: Overview01:31

Potentiometric Titration: Overview

Potentiometric titration is a quantitative analytical technique that determines the concentration of an analyte by measuring the potential difference between the two electrodes in the solution. The endpoint of a potentiometric titration is the point at which there is a significant change in the potential difference. It occurs when the stoichiometric reaction between the analyte and the titrant is complete. The endpoint is usually determined graphically by plotting the measured potential...
Precipitation Titration: Overview01:26

Precipitation Titration: Overview

Precipitation titration involves the reaction of a titrant and an analyte to generate an insoluble precipitate. While precipitation titration uses various precipitating agents, silver nitrate is the most common precipitating reagent; titrations involving Ag+ are called argentometric titrations. Usually, the endpoint in a precipitation titration can be detected by visual indicators.
A precipitation titration curve demonstrates the change in concentration of the titrant or analyte upon adding the...
Titrimetric Methods: Types and Commonly Used Strategies01:08

Titrimetric Methods: Types and Commonly Used Strategies

In chemistry, titrimetric methods are broadly classified into three types: volumetric, gravimetric, and coulometric. Volumetric titrations involve measuring the volume of a titrant of known concentration that is required to react completely with an analyte. In gravimetric titrations, the standard solution reacts with the analyte to form an insoluble precipitate, which is filtered, dried, and weighed. In coulometric titrations, current is applied to an electrochemical reaction until the reaction...
Controlled-Current Coulometry: Overview01:27

Controlled-Current Coulometry: Overview

Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...

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Related Experiment Video

Updated: Jun 28, 2026

Tuning a Parallel Segmented Flow Column and Enabling Multiplexed Detection
08:01

Tuning a Parallel Segmented Flow Column and Enabling Multiplexed Detection

Published on: December 15, 2015

A PC-based titrator for flow gradient titrations.

B Fuhrmann1, U Spohn

  • 1Martin-Luther-Universität Halle-Wittenberg Institut für Biotechnologie Weinbergweg 16a Halle/Saale 06120 Germany.

The Journal of Automatic Chemistry
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

A new personal computer (PC) based titrator enables automated gradient flow titrations. This system allows for on-line recording and evaluation of titration curves using various liquid flow detectors.

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Last Updated: Jun 28, 2026

Tuning a Parallel Segmented Flow Column and Enabling Multiplexed Detection
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Published on: December 15, 2015

Parallel-plate Flow Chamber and Continuous Flow Circuit to Evaluate Endothelial Progenitor Cells under Laminar Flow Shear Stress
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Curtain Flow Column: Optimization of Efficiency and Sensitivity
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Curtain Flow Column: Optimization of Efficiency and Sensitivity

Published on: June 12, 2016

Area of Science:

  • Analytical Chemistry
  • Electrochemistry

Background:

  • Traditional titration methods can be time-consuming and may lack automation.
  • Gradient flow titrations offer advantages in sensitivity and precision.

Purpose of the Study:

  • To develop and evaluate a personal computer (PC) based titrator for gradient flow titrations.
  • To enable on-line data acquisition and automatic evaluation of titration curves.

Main Methods:

  • Development of a PC-based titrator system.
  • Generation of concentration gradients using electrolytic or volumetric methods in small tubes.
  • Integration with liquid flow detectors featuring low axial dispersion.
  • Application in titrating thiosulphate with electrogenerated triiodide.
  • Application in titrating ammonia with electrogenerated hypobromite following gas dialytic separation.

Main Results:

  • The developed titrator successfully performs gradient flow titrations.
  • Complete titration curves were recorded on-line and evaluated automatically.
  • The system demonstrated effective use with electrogenerated reagents for specific analyte titrations.
  • Successful application in ammonia determination after gas dialytic separation.

Conclusions:

  • The PC-based titrator is a versatile and automated tool for gradient flow titrations.
  • The system provides accurate and efficient on-line analysis.
  • It is suitable for a range of titrations involving electrogenerated reagents and separation techniques.