Test Price:
$27 per analysis
Acceptable Matrices:
This method is universal for the determination of nitrogen content and can be used for nearly all food products.
Unacceptable Matrices:
Pure oils and shortenings cause fires in the instrument and should be assayed by the Kjeldahl method.
Limit of Detection:
0.10%
Sample Size Requirements:
Please provide a sample of at least 20g to ensure results representative of the sample submitted.
Equipment:
Protein/Nitrogen by combustion analyzer.
Reportable Units:
% Nitrogen
Turnaround Time:
7-9 Business Days
Is rush testing available?
Yes
Method Reference:
AACC 46-30; AOAC 992.15
Method Description:
Total nitrogen is determined using a combustion instrument operating on the Dumas principle. This method is universal for the determination of nitrogen content and can be used for nearly all food products. Pure oils and shortenings may cause fires in the instrument and should be assayed by the Kjeldahl method.
The sample is completely combusted at high temperature in the presence of pure O2 (99.9%). Combustion products are H2O, CO2, NOx, and N2. Water vapor, oxygen, and CO2 are removed from the resulting gas stream by a series of thermoelectric coolers and chemical sorbents. NOx is reduced to N2 when passed through a hot column packed with copper. The resulting N2 is passed to a thermal conductivity detector, where it is quantified using helium as the carrier gas.
Contact Us:
If you have questions about our testing services, please contact us at +1 (800) 245-5615.