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Sample Preparation
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. If using an Air Oven for initial drying and moisture analysis, follow the
instructions provided in that techniques Standard Operating Procedure. If using the SMART 6 system, use one of
the following four different sample spread techniques, based on the viscosity and moisture content of the sample:
• Pipette
– for highly absorbent, high moisture samples (>85% moisture), simply pipette the sample into the
center of the top sample pad. The sample will fully absorb into the pad within a few seconds, after which
the analysis can begin. Example- milk
• Pipette, cover, and press
– for slightly less absorbent products that still have a high moisture content,
pipette the product into the center of the top sample pad, then cover the sample with the bottom sample
pad to fully cover the product. Then gently use the Sample Press to spread the sample thinly and evenly
between the two pads Example- cream
• Mound, cover, and press
– for solid and semi-solid products, use a spatula to place the correct sample
weight on the center of the top glass fiber sample pad while it is still on the balance pan. Then cover with
the bottom sample pad and use the Sample Press to spread the product thinly and evenly. Ensure no
product has pressed out of the two sample pads. Example- meat or cheese
• Powder
– for low moisture samples in granular or powder form, the sample needs to be spread thinly and
evenly for the most accurate and rapid analysis. This can be performed with a CEM template, which allows
the user to easily add the exact same amount of product in the exact same form every time. The user can
also mound the product on the pad and use the spatula to spread it evenly. Example- whey powder
