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Drift Correction and Normalization

SQ standards are a series of standards used for ongoing drift correction when instruments are kept in continuous calibration for a variety of alloys. These "SQ" standards do not correspond to any particular alloy matrix, and their structures may not match that of chill cast disks. Their recommended use is to provide reproducible spectral intensities for drift correction. The compositions are designed to provide convenient reference points for a large number of analytical curves with a minimum number of tests. The standards are checked carefully for homogeneity but are not certified with respect to true composition. Only approximate values are issued with these standards. As with all set up standards, a specific procedure defined by the spectrometer vendor must be followed when replacement SQ standards are put into service to establish the correct relationship to previously defined analytical curves.  Failure to follow the correct replacement practice may compromise analysis accuracy.



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Alcoa Spectrochemical Standards
724-337-5816
800-858-4638
724-337-4090

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