Environmental Chemistry Testing — OECD TG 108 Complexing Formation Ability in Water

Understanding Chemical Affinities: Assessing Metal Interaction and Environmental Stability

The ability of a chemical substance to form complexes with metal ions is a critical factor in determining its environmental fate, mobility, and biological impact in aquatic systems. Weshin provides specialized OECD TG 108 Complexing Formation Ability testing, delivering precise data on the interaction between ligands and metal cations  to support comprehensive regulatory submissions.
 

Our Technical Excellence

• Controlled Environmental Simulation: We conduct studies under strictly regulated pH and temperature conditions to reflect real-world aquatic environments.

• Advanced Detection Methodologies: Utilizing high-precision analytical techniques to monitor complexation kinetics, including:

  • Ion-Selective Electrode (ISE) Potentiometry: For direct measurement of free metal ion concentrations.

  • Spectrophotometric & Turbidimetric Analysis: To characterize the physical state and solubility of the resulting complexes.

• Stability Constant Determination: Quantifying the affinity between the test substance and metal ions to predict the substance’s behavior in the presence of competing ions in wastewater or natural water bodies.

• Water Hardness Impact Assessment: Evaluating how varying levels of water hardness influence the performance and environmental profile of the substance.
   

Application Scope

Essential for chelating agents, detergent components, water treatment chemicals, and agrochemical formulations. This data is vital for Environmental Risk Assessments (ERA) and evaluating the potential interference of substances with biological wastewater treatment processes.


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