Why are the results from my lab testing different from those obtained with my Thermo Scientific Niton XL3t XRF analyzer?
• There are several possible reasons: • The sample may not be homogeneous as analyzed “in-situ” by the Niton® XL3t. To improve data correlation between the XRF and lab techniques, ensure that both methods are analyzing the same sample (this may require scraping paint from the sample for analysis with your Niton XRF analyzer). To put it another way, why would you expect similar results when analyzing different samples? • Often, to remove an adequate quantity of a surface coating to perform ICP analysis, representative material from a number of different samples must be combined to achieve the mass specified in the appropriate test method. In this case, the laboratory will report an average value that may or may not correlate with the result reported with your Niton XRF analyzer; this subject is discussed in greater detail in our whitepaper entitled “Screening Consumer Products for Toxic Substances – X-ray Fluorescence and Reducing Compliance Risk” • Each analytical method reports its re
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