Thermo Scientific NITON XL3t 500, User Manual

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Analysis of Prepared Samples – Ex Situ
Thermo Scientific NITON XL3 Analyzer User’s Guide 1-43
Analysis of Prepared
Samples – Ex Situ
Figure 1-4. Ex-Situ Analysis of Prepared Samples
Sample Collection
Examine the site for differences in surface characteristics before sampling.
Valid results depend on a sufficient and appropriate selection of sites to
sample. Incorrect sample collection may give rise to misleading or
meaningless results, regardless of the analysis method. Delineate sections
with different characteristics and treat them as different areas. It may be
desirable to subdivide larger areas even if they have the same characteristics
to ensure a thorough examination.
Make certain to label each bag thoroughly. Common information included
on each bag includes the person and/or the company who collected the
sample, the location and area where the sample was taken, and the date the
sample was collected.
Prepared sample analysis is the most accurate method for determining the
concentration of elements in a bulk medium using the instrument. Sample
preparation will minimize the effects of moisture, large particle size,
variations in particle size and sample non-homogeneity.
Note
More sample preparation (drying, milling and sifting) will yield greater
accuracy. The drier, finer, and more homogeneous the particles, the better
the measurements.