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Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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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...
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Electrodeposition01:08

Electrodeposition

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Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

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Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
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Sample Preparation for Analysis: Advanced Techniques01:08

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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
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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.
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Traditional and Non-traditional Lead Extraction Techniques.

Gordon Ho1, Ulrika Birgersdotter-Green1, Travis Pollema2

  • 1Division of Cardiology, Cardiac Electrophysiology, University of California San Diego, La Jolla, CA, USA.

Cardiology Clinics
|November 5, 2025
PubMed
Summary

The increasing use of cardiac implantable electronic devices necessitates more lead extractions. Advances in techniques and multidisciplinary collaboration improve the safety and effectiveness of these procedures.

Keywords:
Cardiac implantable electronic deviceLaser extraction sheathLeadless pacemaker retrievalMechanical extraction sheathSnareTransvenous lead extraction

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Area of Science:

  • Cardiology
  • Cardiovascular Surgery
  • Medical Device Technology

Background:

  • The number of cardiac implantable electronic devices (CIEDs) has significantly increased over the past decade.
  • Consequently, the frequency of CIED procedures, including lead extraction, has also risen.
  • These procedures carry inherent risks, necessitating careful planning and execution.

Purpose of the Study:

  • To review current and emerging techniques for transvenous lead extraction.
  • To discuss the retrieval of leadless pacemakers.
  • To emphasize the importance of multidisciplinary collaboration in optimizing patient outcomes.

Main Methods:

  • Discussion of traditional transvenous lead extraction methods.
  • Exploration of non-traditional and advanced extraction techniques.
  • Inclusion of strategies for leadless pacemaker retrieval.

Main Results:

  • Evolving tools and techniques are enhancing the safety and efficacy of CIED lead extraction.
  • Multidisciplinary team collaboration is crucial for pre-procedural planning and complication mitigation.
  • Both leaded and leadless CIED retrieval methods are continually being refined.

Conclusions:

  • Device extraction is becoming more common due to increased CIED utilization.
  • Advanced techniques and collaborative approaches are key to safer and more effective lead extraction.
  • Continuous innovation in extraction tools and strategies is vital for managing CIED complications.