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Description

For the medium - voltage discharges in an argon atmosphere commonly used today for metal<br />analyses, the quality of the discharge space (spark chamber) with respect to freedom from<br />oxygen and water is of critical importance for a reliable analysis.<br />Testing of the quality of the discharge space (including argon) can be based on the appearance<br />of the burn spot and the intensities of the reference lines for check samples for FeSi and AlSi<br />compared with the pure metals (RE 12, RE 13 and RA 10).<br />The following minimum intensities must be obtained for the check sample CFe 0 (FeSi) with<br />HEPS/spark-like discharge (with or without hydrogen in the argon) compared with the pure<br />metal sample:<br />Fe 1877 > 60%, Fe 2730 > 70%, Fe 2813 or 3608 > 80%<br />For the check sample CAl 0 (AlSi) the following minimum intensity must be obtained with<br />HEPS/spark-like discharge (without hydrogen in the argon) compared with the base metal<br />sample:<br />Al 3059 > 70%