27
Methods Development
The CEM Applications Laboratory has developed procedures for various types of
samples. These procedures include parameters (program, power, time, sample
preparation, etc.) needed to program the SMART System
5
™ and analyze samples
in the SMART System
5
and Fat Analysis System. CEM sample analysis
procedures can be requested from the CEM Applications Laboratory.
If a procedure for a particular sample is not included in the applications list, review
all information in this chapter relating to sample preparation, sample spread
technique, time and power parameters, redry time, and bias identification to
develop an application method. If necessary, call the CEM Applications
Laboratory for additional information and assistance (800) 726-3331.
1.
Begin testing at 100% power and 100
°
C.
2.
If the sample has high solids content (approximately 75% solids), begin
testing with a low sample weight (1 - 2 grams).
3.
Use Quick Test, Constant Weight for testing.
4.
Observe weight change closely. The weight should steadily decline. If
weight is erratic (
±
1 mg), the test should be stopped because the sample is
probably burning. Reduce the power to 50% and perform the test again. If
the sample continues to burn, adjust the power in 5 degree increments.
5.
Record final weight result and time.
6.
Perform multiple sample tests with determined power and time. Results
should be within
±
0.2%.
7.
For fat content results, the re-dry power setting should be no higher than the
power setting used to remove moisture.