Sample Preparation Requirements

• Samples must be appropriately prepared and filtered prior to submission. Filtration through a suitable 0.22 µm or 0.45 µm membrane filter compatible with the sample matrix and mobile phase is recommended.
• Samples should contain no or minimal color-producing impurities.
• The sample pH must be within the recommended operational stability range of the selected HPLC column and compatible with the mobile phase and instrument specifications.
• The sample solvent composition should be compatible with the initial mobile phase conditions.
• The client must provide the required analytical method, including (where applicable):
  • Target analytes and expected concentration range
  • HPLC column specifications
  • Mobile phase composition and gradient/isocratic conditions
  • Flow rate
  • Detection wavelength(s) or detector parameters
  • Injection volume
  • Expected retention times and calibration information (if available)

Charges

• The cost for a single HPLC data acquisition run (maximum runtime: 30 minutes; flow rate: 1.0 mL min⁻¹) is LKR 8,000 per sample.

Additional charges will apply for:

• Repeat analysis due to unsuitable sample preparation or sample incompatibility
• Additional injections/trials requested by the client
• Re-analysis arising from sample-related issues