Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Masking and Demasking Agents

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...

Effects of EDTA on End-Point Detection Methods

Effects of EDTA on End-Point Detection Methods

Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...

EDTA: Auxiliary Complexing Reagents

EDTA: Auxiliary Complexing Reagents

EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

EDTA: Direct, Back-, and Displacement Titration

EDTA: Direct, Back-, and Displacement Titration

The EDTA titration types for metal ion analysis include direct titration, back-titration, and replacement titration.
Direct titration involves buffering the metal ion solution to the desired pH and directly titrating with standard EDTA until the endpoint. The optimum pH ensures a large conditional formation constant of metal−EDTA and visibility of the free indicator color in the solution. In addition, auxiliary complexing reagents are used to prevent the precipitation of metal hydroxides and...

EDTA: Indirect and Alkalimetric Titration

EDTA: Indirect and Alkalimetric Titration

Unlike direct titration, back-titration, and displacement titration, indirect titration is an EDTA titration method for quantifying anions. In the indirect titration method, anions are precipitated as their insoluble salts with excess metal ions. The filtrate containing the excess metal ions is directly titrated with standard EDTA until the endpoint is achieved. Another approach involves extracting the metal ion and back-titrating with standard EDTA to obtain the endpoint. In this way, the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Pan-genome and reverse vaccinology for a multi-epitope vaccine against circulating post-2022 Monkeypox virus strains.

PloS one·2026

Same author

Integrative analysis of single nucleotide polymorphism of PDE7B (rs2327669) with biopsychosocial and biochemical parameters in β-thalassemia major patients in Pakistani Cohort.

Molecular biology reports·2026

Same author

Effect of Intrawound Vancomycin Powder as an Adjunct to Systemic Antibiotic Prophylaxis on Surgical Site Infection Following Open Tibial Fracture Fixation: A Randomized Prospective Study.

Journal of orthopaedic case reports·2026

Same author

Corrigendum to "global research on the air quality status in response to the electrification of vehicles" [Science of the Total Environment, 795, (2021), 148861].

The Science of the total environment·2026

Same author

Characterization of complex environmental contaminant mixtures in common toad breeding ponds in Flanders, Belgium.

Environmental pollution (Barking, Essex : 1987)·2026

Same author

Evaluating the regenerative capacity of biosynthesized nano formulated 3D scaffolds in scald burn healing.

RSC advances·2025

Same journal

Reactivity and environmental fate of emerging contaminants in wastewater treatment systems: A reactive continuum framework approach.

Chemosphere·2026

Same journal

Vinasse fertigation modifies soil-microbiota-plant interactions and metabolism in sugarcane.

Chemosphere·2026

Same journal

Corrigendum to 'Exposure to the Polychlorinated biphenyl mixture Aroclor 1254 elicits neurological and cardiac developmental effects in early life stage zebrafish (Danio rerio)' [Chemosphere 371 (2025), 144023].

Chemosphere·2026

Same journal

Microplastic footprints in freshwater ecosystems: Raman spectroscopy of microplastics as indicator of anthropopressure in Northeastern Poland's lakes.

Chemosphere·2026

Same journal

Estimation of VOC emissions from an electric vehicle interior as a function of cabin air temperature using a selected ion tube flow mass spectrometer (SIFT-MS) measurement.

Chemosphere·2026

Same journal

A direct SPE clean-up after protein precipitation methodology to remove endogenous steroid sulfate MRM interferences for PFAS analysis of serum samples by isotope dilution LC-MS/MS.

Chemosphere·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 26, 2026

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Published on: October 23, 2013

EDTA-assisted Pb phytoextraction.

Saifullah¹, E Meers, M Qadir

¹Institute of Soil and Environmental Sciences, University of Agriculture, Fasialabad, Pakistan.

|January 6, 2009

Summary

This summary is machine-generated.

Phytoextraction uses plants to clean lead-polluted soil. EDTA enhances lead uptake but poses environmental risks, prompting research into safer, degradable alternatives for soil remediation.

More Related Videos

High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils

High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils

Published on: February 9, 2019

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Published on: July 5, 2017

Related Experiment Videos

Last Updated: Jun 26, 2026

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Published on: October 23, 2013

High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils

High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils

Published on: February 9, 2019

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro

Published on: July 5, 2017

Area of Science:

Environmental Science
Soil Science
Bioremediation

Background:

Lead (Pb) is a pervasive soil pollutant, primarily in surface layers.
Phytoextraction offers a sustainable, in situ method for rehabilitating heavy metal-contaminated soils using plants.
Phytoextraction success hinges on plant biomass, metal concentration, and metal bioavailability.

Purpose of the Study:

To evaluate the effectiveness and limitations of phytoextraction for lead-contaminated soils.
To explore the role of chelating agents, specifically EDTA, in enhancing lead phytoextraction.
To address the environmental concerns associated with EDTA and investigate alternative strategies.

Main Methods:

Review of existing literature on lead phytoextraction and chelating agent applications.
Analysis of factors influencing phytoextraction efficiency, including biomass and metal bioavailability.
Discussion of the environmental impact of EDTA and the need for degradable alternatives.

Main Results:

Lead is a widespread soil pollutant with limited natural solubility.
EDTA enhances lead solubility and translocation in plants, increasing phytoextraction efficiency.
EDTA's environmental persistence and strong chelating properties present significant risks, including metal leaching.

Conclusions:

While EDTA-assisted phytoextraction can increase lead removal, its environmental drawbacks necessitate a shift away from its use.
The scientific community is exploring more degradable alternatives like organic acids and aminopolycarboxylic acids (APCAs).
Lessons learned from EDTA-assisted phytoremediation are crucial for developing effective and environmentally sound assisted phytoextraction practices.