| Autor: |
Anna M. Roelofsen, Robert F. M. Herber, Herman J. Pieters, W. van Deijck |
| Rok vydání: |
1984 |
| Předmět: |
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| Zdroj: |
Spectrochimica Acta Part B: Atomic Spectroscopy. 39:397-405 |
| ISSN: |
0584-8547 |
| DOI: |
10.1016/0584-8547(84)80047-6 |
| Popis: |
A new pyrometric temperature feedback control system 1 for ETA-AAS is introduced which controls the entire temperature range needed for analysis. The system consists of a single infrared sensitive detector and independent feedback control circuitry for the three separate heating stages of a Varian CRA 63 or CRA 90 power supply to which it was added. The temperature region covered by the system encompassed from 300 to 3300 K. The precision of the temperature control amounts to ±20 K at 330 K., ±5 K at 700 K and ±2 K at 2300 K. In order to test the performance of the system, lead in blood and cadmium in urine were determined. Substantial improvements as compared to the conventional system were obtained with respect to optimization of the temperature program, precision and sensitivity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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