Volumetric Solutions: Selection and Ordering Guide

Define the method before the product

Record the titration method, expected sample range, concentration, units and applicable procedure before selecting a solution. Similar names can represent different concentration bases or standardisation requirements.

Ready-to-use solution or standard for preparation?

A ready-to-use volumetric solution reduces preparation work and can support consistency when supplied with suitable batch documentation. A standard used to prepare or standardise a solution supports a different workflow and still requires controlled preparation, equipment and records.

• Confirm whether the method calls for a prepared solution or a material used for standardisation.
• Check the nominal concentration and permitted tolerance.
• Identify whether a correction factor or actual concentration is reported for the batch.

Documentation and traceability

The certificate should be evaluated for the exact catalogue reference and delivered lot. Check the stated concentration, units, standardisation method, reference or traceability statement, uncertainty where supplied, date, shelf life and storage conditions.

Packaging and stability

• Choose a volume that matches consumption and post-opening stability.
• Check container material and closure compatibility with the solution.
• Confirm storage temperature, light protection and transport limitations.
• Plan how opening date, lot and expiry will be recorded in the laboratory.

Information to include in a quotation request

• Solution name and chemical formula where relevant.
• Required concentration, units and method or pharmacopoeia reference.
• Pack size, number of units and delivery country.
• Required certificate, traceability or uncertainty information.
• Any minimum remaining shelf-life requirement at delivery.