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.
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.
Measurement of chromium (Cr) in Brass
An superior detection lower limit of 18ppm at 300 seconds was achieved at optimal measurement conditions.
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 |
