Measurement of Brass Sample
High sensitive measurement conducted with SEA1200VX enables significantly better "limit of detection" and superior repeatability.
Measurement of lead (Pb) in Brass
Excellent linearity of a calibration curve for brass created at optimal measurement conditions achieves a detection lower limit of Pb 16 ppm at a measuring time of 300 seconds.
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Measurement of cadmium (Cd) in Brass
Excellent linearity of the calibration curve was also obtained at optimal measurement conditions resulting in an excellent detection lower limit of 5 ppm Cd at a measuring time of 300 seconds.
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Measurement of chromium (Cr) in Brass
An superior detection lower limit of 18ppm at 300 seconds was achieved at optimal measurement conditions.
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Repeatability at 100 seconds measurement
The table below shows high repeatability using a brass standard sample: CV 6.3% for Cd, CV 3.6% for Pb, and CV 9.0% for Cr.
Measurement Conditions
Voltage: 50kV (Cd, Pb), 15kV (Cr)
Current: 1000µA (Cd), 273µA (Pb), 353µA (Cr)
Collimator: φ8mm
Filter: for Cd, for Pb & for Cr
Time: 100 sec.
Standard Sample
Brass GBR6 made by Sumitomo Metal Technology
Cd | Pb | Cr | |
---|---|---|---|
Ave. (ppm) | 129 | 492 | 149 |
Readings | 20 | ||
STDEV (ppm) | 8.2 | 17.7 | 13.5 |
CV% | 6.3 | 3.6 | 9.0 |
Results (ppm) | 136 | 505 | 157 |