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Determination of lead(II) by argentimetry
O E Godinho1, J J Rohwedder, M N Eberlin
1Instituto de Química, Universidade Estadual de Campinas, C.P. 6154, 130891 Campinas, SP, Brazil.
Talanta
|February 1, 1991
Summary
A new titrimetric method accurately determines lead(II) using silver ions. This method, involving sodium hydroxide and silver nitrate titration, achieves less than 0.5% error for lead(II) analysis.
Area of Science:
- Analytical Chemistry
- Inorganic Chemistry
Background:
- Accurate determination of lead(II) is crucial in environmental and industrial monitoring.
- Existing methods for lead analysis may have limitations in sensitivity or complexity.
Purpose of the Study:
- To develop and validate a precise titrimetric method for quantifying lead(II) ions.
- To establish a reliable analytical procedure using readily available reagents.
Main Methods:
- A novel titrimetric approach was employed, utilizing the reaction between plumbite and silver ions.
- Lead(II) samples were treated with sodium hydroxide to redissolve lead hydroxide precipitate.
- Titration with silver nitrate, monitored by a silver electrode, was performed in a 0.025M sodium chloride solution.
Main Results:
- The developed method demonstrated high accuracy for lead(II) determination.
- An error rate below 0.5% was achieved for samples with 0.05M lead(II) concentration.
- The use of a silver electrode ensured reliable monitoring of the titration endpoint.
Conclusions:
- The described titrimetric method offers a precise and efficient way to determine lead(II).
- This technique provides a valuable tool for accurate lead analysis in various applications.
- The method's simplicity and accuracy make it suitable for routine laboratory use.
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