发明名称 Flameless atomization
摘要 Chemical analysis apparatus such as a spectrophotometer, having a carbon rod or other non-flame atomizer which is adapted to be heated by electrical resistance heating. The atomizer is included in a heater circuit, and a particular relationship exists between the electrical resistance of the atomizer and the electrical resistance of the remainder of that circuit. That relationship is such that variations in the atomizer resistance as may occur over a period of use, do not substantially affect power dissipation in the atomizer during heating. Ideally, the two resistance values are equal, but variations from the ideal are satisfactory in practice. A feed-back circuit is arranged to maintain a substantially constant voltage across the heater circuit, and that is achieved by comparing the applied voltage with a reference voltage and modifying the applied voltage as necessary to maintain a predetermined relationship between the two.
申请公布号 US4134685(A) 申请公布日期 1979.01.16
申请号 US19760751761 申请日期 1976.12.16
申请人 VARIAN TECHTRON PROPRIETARY LIMITED 发明人 EGAN, EDWARD G.;JACKSON, IAN S.;BENNETT, PETER
分类号 G01N21/74;G05F1/12;(IPC1-7):G01J3/30 主分类号 G01N21/74
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