Comparison of droplet-size distribution and matrix effects in flame atomic absorption spectrometry applying hydraulic high-pressure/perfomance nebulization and pneumatic nebulization
✍ Scribed by J. Posta; H. Berndt; B. Derecskei
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 576 KB
- Volume
- 262
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
The solution to be analysed 1s forced through a very fine nozzle (20 pm) under a pressure of 100-400 bar (lo-40 MPa) usmg a hqmd chromatographlc pump, resulting m an aerosol for sample mtroductlon m atormc absorption spectrometry GAS) Compared with pneumatic nebuhzatlon, the hydrauhc lugh-pressure/performance nebuhzation (HHPN) causes an essentially smaller proportIon of large droplets (> 16 pm) HHPN, l%, standard flame AAS nebuhzatlon, 7%, mductlvely coupled plasma nebuhzatlon, 34% The smaller droplets of the HHPN aerosol lead to lugher sensitWy (Zfold m sIgna height, 5-6-fold m signal area) and to lower matrur Interferences (better evaporation of smaller droplets m the spedroscopic source)