Signal Calculation
Mathematical summation calculates the total area under a chromatographic curve to determine the abundance of a specific peptide analyte. This peak area integration is the core step in translating electronic instrument signals into physical concentrations of wool and cashmere proteins. It provides a numerical value that corresponds directly to the amount of peptide injected into the system.
Blend Measurement
When testing a blended fabric, the ratio of the integrated peak areas of different species-specific peptides reveals the percentage of each fiber in the yarn. For example, if peak area integration shows a high level of a sheep wool peptide alongside a small cashmere peak, the lab can prove the garment is mostly wool. This measurement is critical for verifying the accuracy of garment labels, giving retailers the raw data they need to challenge non-compliant suppliers.
Testing Precision
The accuracy of this calculation depends on setting the baseline correctly and defining where the peak starts and ends. If the chromatography has high noise or overlapping peaks, the peak area integration can be skewed. This error would lead to incorrect fiber percentages, potentially causing a shipment to fail inspection.
Quality Control
Automated software performs this task to ensure consistency across hundreds of daily test runs. However, technicians must manually review any unusual chromatograms to correct baseline errors. This careful verification protects the integrity of the fiber analysis report.
