Low flow,externally air cooled torch for inductively coupled plasma atomic emission spectrometry with axial viewing |
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| Institution: | 1. Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, People''s Republic of China;2. National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, People''s Republic of China;3. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi''an 710062, People''s Republic of China;3. Institute for Protein Research, Osaka University, Yamadaoka 3-2, Suita, Osaka 565-0871, Japan;4. the Department of Biochemistry, Eötvös Loránd University, Pázmány sétány 1/C, Budapest 1117, Hungary;1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China;2. Department of Chemistry, Tsinghua University, Beijing 10084, China |
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| Abstract: | The torch wall is cooled largely by air passing through a cooling jacket added to the outside of a Fassel torch. The plasma is viewed axially through a cooled cone interface centered on the axial channel. The outer argon gas flow can be reduced to 7 l min−1 with no compromise in performance or torch lifetime. The plasma exhibits the same ‘robustness index’ and interference effects from Na as the conventional, high-flow ICP supplied with the particular spectrometer used. Detection limits (DL) for lines at ∼200 nm are poorer by approximately a factor of two, while those for lines at ∼400 nm are actually better than values typically seen for the same lines by axial viewing of a conventional, high-flow ICP. |
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