Determination of Protein Content by NIR Spectroscopy in Protein Powder Mix Products.Protein is a principal component in commonly used dietary supplements and health food products.  A rapid test method was developed using near-infrared (NIR) spectroscopy as a compliment to current protein determination by the Dumas combustion method.  The NIR method was found to be a rapid, low-cost, and green (no use of chemicals and reagents) complimentary technique.  A NIR regression model was developed with 17 samples within the constituent range and was validated with 20 independent samples of known protein levels (85-88%).  The results show that the NIR method is capable of predicting the protein content with a bias of ±2% and a maximum bias of 3% between NIR and the external Dumas method.
NIR
Determination of Protein Content by NIR Spectroscopy in Protein Powder Mix Products.Protein is a principal component in commonly used dietary supplements and health food products.  A rapid test method was developed using near-infrared (NIR) spectroscopy as a compliment to current protein determination by the Dumas combustion method.  The NIR method was found to be a rapid, low-cost, and green (no use of chemicals and reagents) complimentary technique.  A NIR regression model was developed with 17 samples within the constituent range and was validated with 20 independent samples of known protein levels (85-88%).  The results show that the NIR method is capable of predicting the protein content with a bias of ±2% and a maximum bias of 3% between NIR and the external Dumas method.
NIR
Determination of Protein Content by NIR Spectroscopy in Protein Powder Mix Products.Protein is a principal component in commonly used dietary supplements and health food products.  A rapid test method was developed using near-infrared (NIR) spectroscopy as a compliment to current protein determination by the Dumas combustion method.  The NIR method was found to be a rapid, low-cost, and green (no use of chemicals and reagents) complimentary technique.  A NIR regression model was developed with 17 samples within the constituent range and was validated with 20 independent samples of known protein levels (85-88%).  The results show that the NIR method is capable of predicting the protein content with a bias of ±2% and a maximum bias of 3% between NIR and the external Dumas method.
NIR
A rapid test method was developed using near-infrared (NIR) spectroscopy as a compliment to current protein determination by the Dumas combustion method. 
Dumas combustion method
Determination of Protein Content by NIR Spectroscopy in Protein Powder Mix Products.Protein is a principal component in commonly used dietary supplements and health food products.  A rapid test method was developed using near-infrared (NIR) spectroscopy as a compliment to current protein determination by the Dumas combustion method.  The NIR method was found to be a rapid, low-cost, and green (no use of chemicals and reagents) complimentary technique.  A NIR regression model was developed with 17 samples within the constituent range and was validated with 20 independent samples of known protein levels (85-88%).  The results show that the NIR method is capable of predicting the protein content with a bias of ±2% and a maximum bias of 3% between NIR and the external Dumas method.
NIR
Determination of Protein Content by NIR Spectroscopy in Protein Powder Mix Products.Protein is a principal component in commonly used dietary supplements and health food products.  A rapid test method was developed using near-infrared (NIR) spectroscopy as a compliment to current protein determination by the Dumas combustion method.  The NIR method was found to be a rapid, low-cost, and green (no use of chemicals and reagents) complimentary technique.  A NIR regression model was developed with 17 samples within the constituent range and was validated with 20 independent samples of known protein levels (85-88%).  The results show that the NIR method is capable of predicting the protein content with a bias of ±2% and a maximum bias of 3% between NIR and the external Dumas method.
NIR