This presentation is about detecting post mortem meat quality through near infrared spectroscopy.

1. DETECTING POST-MORTEM
MEAT QUALITY THROUGH NEAR
INFRARED SPECTROSCOPY

3. CONTENT
•Introduction
•Uses in meat industry
•Carcass freshness
•Color determination
•Fatty acid content and
quality determination
•Moisture content
•pH value
•Advantages vs
Disadvantages
•Conclusion
•Sources

4. INTRODUCTION
•All atoms and molecules absorb and emit
light at certain wavelengths.
•NIR spectroscopy measures the absorption
of electromagnetic radiation.
•Region of the electromagnetic spectrum
(from 780 nm to 2500 nm).

5. DATA COLLECTION WITH NIR SPECTROSCOPHY

6. USES IN MEAT INDUSTRY
•Rapid application
•Used for the analysis of:
1. Carcass freshness
2. pH measurement
3. Protein content
4. Myoglobin content
5. Moisture content
6. Fat content

7. CARCASSE FRESHNESS
•With the passage of time, NIR’s resulted spectra has found to be changed
•This change is correlated with the myoglobin and oxymyoglobin content
•This change was detected at various temperature and time
•Results were reliable

8. COLOR DETERMINATION
•Color detection is difficult
•NIR’s ability to determine L* value on L*,a*,b* color scale is often inaccurate
•Results are often unreliable
•Require to scan large area and multiple scans for more accuracy

9. FAT CONTENT AND QUALITY OF CARCASS
•NIR’s ability to detect fat type depend on the fat content
•Detect better when quantity is medium to high
•Inaccuracy increase with lower fat content
•Similar absorption pattern of different fatty acid is a limiting factor
•Freeze drying sample increase prediction
•Limited in detecting PUFA

10. MOISTURE CONTENT
•NIR found to be highly accurate in deterring moisture content
•It is due to the fact that water’s OH ion interact very well with infrared radiation.
•Moisture content determine freshness and microbial growth viability.

11. PH. VALUE
•NIR spectroscopy in determining pH values after 20-40 min of slaughter
•It has limited accuracy
•High pH carcasses was determined with 90% accuracy
•Partial least square (PLS) was used for determining the validity of the model

12. ADVANTAGES
•Noninvasive
•Chemical-free
•Rapid analytical technique
•Screening purposes
•Detect several attributes
simultaneously
DISTADVANTAGES
• Sample presentation, which may become a
crucial issue
• Sample heterogeneity
• Moisture affect readings
• Required to scan a lot of area
• Time consuming for accuracy
• Temperature

13. CONCLUSION
•Best for rapid online sample analysis with less accuracy
•Measuring cost is low, equipment cost is high
•Researchers searching for sensitive wavelengths NIR region.
•Testing environment affect readings

14. SOURCES