Temperature of a W ribbon furnace in electrothermal atomic absorption spectrometry |
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| Affiliation: | 1. State Key Laboratory for Manufacturing Systems Engineering and Systems Engineering Institute, Xi''an Jiaotong University, Xi''an 710049, PR China;2. School of Sciences, Guizhou Institute of Technology, Guiyang 550003, PR China;1. Research Institute for Environmental Technology and Sustainable Development, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea;2. School of Earth Sciences and Environmental Engineering (SESE), Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea;3. Global Desalination Research Center (GDRC), Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea;4. National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan;5. Headquarters of Research Planning, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea |
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| Abstract: | Temperatures of the surface of a W ribbon furnace were measured using a pyrometer. The accuracy of the indicated temperatures was ascertained by a method based on the melting points of some metals, and it was demonstrated that the furnace temperature can be obtained with the pyrometer within an error of ± 15 K in a range from 1000 to 2000 K.A mathematical model for predicting the temperature was also proposed. The model is based on the power balance during atomization in the furnace. Two terms are essential: the power supplied to the furnace and the power lost by convection of sheath gas. Temperatures calculated by this model agreed well with those measured with the pyrometer. |
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