Related Experiment Video
Updated: Aug 13, 2026

07:32
Dynamic Electrochemical Measurement of Chloride Ions
Published on: February 5, 2016
[Development of a method for determining lead blood levels with chronopotentiometry]
H Mathieu1, F Le Moigne, G Panteix
1Laboratoire Bioffice, Bordeaux. mathieu.henri-p@wanadoo.fr
Annales De Biologie Clinique
|January 9, 2004
Summary
A new potentiometric stripping analysis method accurately determines blood lead levels. This cost-effective technique offers rapid results, making it ideal for clinical laboratories.
Area of Science:
- Analytical Chemistry
- Environmental Science
Context:
- Blood lead determination is crucial for public health.
- Existing methods can be time-consuming and expensive.
Purpose:
- To investigate a novel potentiometric stripping analysis (PSA) method for blood lead determination.
- To establish a rapid, accurate, and cost-effective alternative for clinical settings.
Summary:
- A PSA method using hemoglobin precipitation with hydrochloric and perchloric acids was developed.
- This method allows for simplified calibration and improved sensitivity and precision.
- Analysis time is 3 minutes per sample with a detection limit of 0.006 microM/L.
Impact:
- The PSA method demonstrates high correlation (R=0.991) with graphite furnace atomic absorption spectrometry.
- It offers a less expensive and convenient alternative for routine blood lead analysis in clinical laboratories.
More Related Videos
Related Concept Videos
Electrodes: Overview
Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
Potentiometry: Overview
Potentiometry is an analytical technique that measures the potential difference between two electrodes in an electrochemical cell without drawing any significant current that could alter the solution's composition. This method employs an indicator electrode, which exchanges electrons with the analyte solution, and a reference electrode with a constant potential. Each electrode is immersed in a solution comprised of two half-cells. In a conventional setup, the reference electrode serves as the...
Potentiometry: Types of Electrodes
Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
Controlled-Potential Coulometry: Electrolytic Methods
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential ensures...
The chosen potential ensures...
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...
In the Volhard method, a standard excess of AgNO3 is first added to the...
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...

