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Sample Analysis
Sample Analysis
Proper product sampling and preparation are critical to achieving optimal accuracy and precision using the SMART
6. Each sample has a unique composition, and therefore may require a unique preparation and application process
along with an individual method specific to that sample type. The SMART 6 has been developed to remove many
different variables that can affect results, but the guidelines below should be followed to optimize each analysis.
Sampling
Proper sampling of any product type is necessary for a rapid analysis that accurately represents the entire
production batch or line. Many standard procedures have been developed specific to each sample type by various
agencies such as AOAC, USDA, or ASTM. Reference each agency for the correct procedure prior to moving forward
with analysis on the SMART 6.
Preparation
Sample preparation should be practiced to ensure that a homogeneous sample is being analyzed. As with any
chemical analysis, a homogeneous sample leads to a more representative test and better results when comparing
duplicate results or reference chemistry. Sample preparation can entail physical or chemical changes to the
sample to improve analysis.
Weight
Consistent sample weight helps ensure precision and accuracy. While sample size can vary from 1.0 grams to 25
grams depending on the type of product being tested, repeatability within the same sample is important to avoid
burning or under-drying of a sample. All methods require inputting the sample weight range during the development
process, and this range is clearly displayed during every test to assist the user in sample weight consistency.
Glass Fiber Pads
All SMART 6 systems use the CEM glass fiber sample pads to assist in rapid and accurate testing. The pads are
specially designed to support the sample being tested without absorbing heat, but remaining porous enough to let
moisture freely evaporate.
• Liquid samples (typically above 25% moisture) normally use 2 glass fiber sample pads to help retain heat in the
sample and avoid splattering during the heating process.
• Dry samples (typically below 15% moisture) require only a single glass fiber sample pad for the analysis.
Application
Also known as the sample spread technique, the application of a sample to the glass fiber sample pads is equally
important in achieving optimal results. The SMART 6 system uses different sample spread techniques based on
the viscosity and moisture content of the sample.
CAUTION
Not following proper sample preparation and spread techniques can lead to a reduction in precision,
inaccurate results, or even damage the system.
