Sample Preparation Requirements

• Samples must be completely dried prior to submission.
• Samples should be free from visible coloration and particulate matter.
• The analyte concentration should generally be below approximately 150 ppm.
• Samples must be filtered using a suitable 0.2 µm PTFE syringe filter prior to injection.
• Samples should be prepared in a GC–MS-compatible solvent with appropriate volatility and chemical stability.
• The client must provide the required analytical method, including (where applicable):
• Target compounds and expected mass range
• Sample preparation procedure
• Solvent information
• GC column specifications
• Oven temperature program
• Carrier gas conditions
• Injection parameters
• MS acquisition parameters (e.g., scan mode/SIM parameters)

Charges

• The cost for a single GC–MS data acquisition run (maximum runtime: 30 minutes; carrier gas flow equivalent to approximately 1.0 mL min⁻¹) is LKR 8,500 per sample.

Additional charges will apply for:

• Additional injections or confirmation runs
• Repeat analysis due to inappropriate sample preparation
• Additional trials requested by the client