Zur verkürzung der Analysenzeit durch Erhöhung der Funkenfolgefrequenz im Bereich 50 500 Hz bei der optischen Emissionsspektralanalyse von Stahl und Anregung mit unipolaren Mittelspannungsfunken
Abstract
The effects of increasing the repetition rate of a spark source for optical emission spectroscopy on analysis time, accuracy and precision were investigated by measuring the distribution of the optical yields of each spark, and the integrated intensities of some 100-1000 sparks. Results show that the yields of single discharges vary only slightly with varying repetition rate. The reproducibility becomes worse with increasing repetition rate as well as with increasing number of presparks. The disadvantages of high repetition rates become significant only above certain frequencies which are dependent on the discharge energy. An increase of the repetition rate during presparking leads to a better conditioning of the surface (as with higher discharge energies), and thus to improved reproducibility and accuracy.
- Publication:
-
Spectrochimica Acta - Part B: Atomic Spectroscopy
- Pub Date:
- August 1972
- DOI:
- 10.1016/0584-8547(72)80035-1
- Bibcode:
- 1972AcSpB..27..365H