Aquastar® Two Component Reagents and Solvent – Reliable, Fast Karl Fischer Titration by Merck for Analytical Chemistry

Laboratories require precise, reliable solutions for accurate water content analysis. Aquastar® two component reagents and solvent meet these demands by delivering faster titration rates, high accuracy, and greater long-term stability in Karl Fischer volumetric methods. This page details how Aquastar® products can elevate analytical performance and support complex sample matrices.

Benefits of Aquastar® Two Component Reagents and Solvent

• Faster titration rates: Supports faster Karl Fischer volumetric titration, with slightly faster titration than one component titration.
• High accuracy: Delivers high accuracy for reliable results in water content analysis.
• Better buffer capacity: Provides improved buffer capacity for demanding analytical work.
• Higher titer stability: Offers higher or slightly better titer stability than one component titrants.
• Greater long term stability: Distinguishes two component reagents by greater long term stability for dependable routine use.
• Consistent analytical quality: Supports consistent high quality for comparable results.
• Suitable for repeated matrix testing: Often used for series from the same sample matrices.
• Suitable for challenging samples: Often used for strong acidic or alkaline samples.

Features of Aquastar® Two Component Reagent System

• Two component system composition: Aquastar two component reagents are designed as a Karl Fischer volumetric system in which the titrant contains iodine and alcohol, while the solvent contains sulfur dioxide and a base.
• Difference from one component reagents: Unlike one component Karl Fischer reagents, the two component reagent system separates the Karl Fischer reaction components between the titrant and the solvent.
• Titrant formulation: In the two component reagent system, the titrant contains iodine and methanol.
• Solvent formulation: The solvent contains sulfur dioxide and a suitable base dissolved in methanol.
• Working medium role: The Aquastar solvent is used as the working medium in the Karl Fischer cell.
• System use requirement: Aquastar two component titrants must be used together with Aquastar two-component solvent.
• Available titrant concentrations: Aquastar titrants are available with concentrations of 2 mg H₂O/mL and 5 mg H₂O/mL for higher and lower water content.
• Chloroform-free composition: The two component reagents are without chloroform.

Application and Usage in Karl Fischer Volumetric Titration

• Working medium in volumetric Karl Fischer titration: Aquastar® two component solvent is used as the working medium in the Karl Fischer cell.
• Sample introduction: The solvent is the medium to which the sample to be analyzed is added.
• Use with matching titrants: Aquastar® two component titrants must be used together with Aquastar® two component solvent in the two component Karl Fischer volumetric method.
• Titrant selection: Aquastar® titrants are available with concentrations of 2 and 5 mg H₂O/mL for use with Aquastar® solvent.
• Typical use pattern: Aquastar® two component reagents are often used for series from the same sample matrices.
• Challenging sample types: They are also often used for strong acidic or alkaline samples.

Aquastar® Two Component Reagents & Solvents

With over 23 years of expertise, Chemical Express is the official distributor of Merck in Thailand. Aquastar® two component reagents, solvents and related analytical products from Merck can be conveniently purchased through Chemical Express to meet your laboratory’s precise requirements.