Raman spectroscopy for salmon quality control
Fiber-coupled Raman solutions for non-invasive aquaculture quality assessment.
IDIL provides compact, fiber-coupled Raman spectroscopy systems for in-situ nutritional and quality analysis in aquaculture operations, supporting sustainable fish farming and food safety verification. IDIL solutions include:
- Compact fibered Raman spectrometers
- Custom fiber optic probes for surface measurements
- Food-compatibility and contactless probe configurations
- Multi-wavelength laser-compatible probe designs
The aquaculture quality control challenge
Global salmon demand has grown significantly in recent years, with most production from farmed sources. Evaluating nutritional quality—color, taste, and omega-3 content—traditionally requires destructive laboratory analysis, making it impossible to monitor quality on living stock or adjust feeding strategies based on real-time data. Key technical challenges include:
- Destructive testing: Standard methods require sacrificing fish to prepare samples compatible with benchtop equipment
- Limited real-time monitoring: Laboraty analysis prevents continuous quality assessment during farming
- Feed optimization constraints: Inability to measure nutritional parameters on living fish limits feed adjustment strategies
- Product authentification: Detecting adulteration in processed products (e.g., spreads) requires rapid screening methods
Without rapid, non-invasive testing capabilities, aquaculture operations cannot optimize feeding protocols based on real-time biochemical data or efficiently verify product authenticity.
Application example: Non-destructive nutritional profiling in salmon farming
Salmon quality is determined by specific biochemical markers: carotenoids (providing characteristic pink color), lipid content and fatty acid profiles (including saturated and unsaturated fats), and moisture levels (affecting nutritional value). These parameters vary by salmon type and origin, supporting provenance verification and pricing.
IDIL’s solution: A portable, fiber-coupled Raman system with custom-designed fiber optic probes enabling field deployment. Key features include:
- Non-destructive surface measurements: Through-skin or surface analysis without tissue damage
- Food compatibility: Probe design suitable for contactless or food-grade direct measurements
- Multi-wavelength adaptability: Single probe compatible with multiple laser wavelengths
- Field portability: Compact system for on-site measurements at farming facilities
The system provides Raman spectra for immediate analysis of carotenoid pigments, fatty acid composition, and moisture content—enabling farmers to optimize feed formulations based on measurable nutritional parameters and verify product quality in processed goods.
