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Related Concept Videos

EDTA: Auxiliary Complexing Reagents01:26

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...
Masking and Demasking Agents01:19

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...
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
EDTA: Indirect and Alkalimetric Titration01:23

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...
EDTA: Direct, Back-, and Displacement Titration01:30

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...
Effects of EDTA on End-Point Detection Methods01:18

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...

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Related Experiment Video

Updated: May 22, 2026

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method
09:38

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

Published on: October 23, 2013

EDTA-S: A novel root conditioning agent.

S Srirangarajan1, S Ravindra, S Aparna

  • 1Department of Periodontics, Bangalore Institute of Dental Sciences and Post Graduate Research Centre, Bangalore, India.

Journal of Indian Society of Periodontology
|May 26, 2012
PubMed
Summary
This summary is machine-generated.

The addition of soft soap to 15% ethylenediaminetetraacetic acid (EDTA) significantly improved smear layer removal compared to plain EDTA. Active application of the root conditioning agent was more effective than passive application.

Keywords:
Ethylenediaminetetraacetic acidperiodontal therapyroot surfacescanning electron microscopesmear layer

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Area of Science:

  • Periodontology
  • Dental Materials Science

Background:

  • Smear layer removal is crucial for periodontal regenerative therapy.
  • Conventional scaling and root planing with saline irrigation are insufficient for complete smear layer removal.
  • Ethylenediaminetetraacetic acid (EDTA) is a standard root conditioning agent.

Purpose of the Study:

  • To assess the efficacy of a 15% ethylenediaminetetraacetic acid with soft soap (EDTA-S) preparation for removing smear layer from human root surfaces.
  • To compare the effectiveness of EDTA-S with plain EDTA.
  • To evaluate the impact of active versus passive application techniques.

Main Methods:

  • Human teeth with periodontal disease were prepared to create an experimental smear layer.
  • Root surfaces were treated with either saline (control), 15% EDTA, or 15% EDTA-S.
  • Treatments involved both active and passive application methods.
  • Smear layer removal was analyzed using scanning electron microscopy and a standardized index.

Main Results:

  • EDTA-S demonstrated superior smear layer removal compared to plain EDTA and the control group.
  • Active application of the root conditioning agent resulted in significantly better smear layer removal than passive application.
  • The combination of EDTA with soft soap enhanced cleaning efficacy.

Conclusions:

  • EDTA-S offers significant advantages over plain EDTA for smear layer removal in periodontal therapy.
  • Active application of root conditioning agents is more effective than passive application.
  • The findings support the use of EDTA-S for improved root surface debridement.