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晶体控制振荡器的27.12兆赫2.5千瓦高频发生器和Fassel-Scott型炬管用于产生一个低气流空气-氩感耦等离子体(ICP)。维持稳定等离子体所需冷却气流(空气)为8升/分,辅助气流(氩)2.5升/分和载气(氩)0.7升/分。维持等离子体所需最低R.F.功率约在1000瓦左右。同纯氩ICP相比较,空气-氩ICP具有较小的外形尺寸,其最佳观察分析区的位置较低。本工作测量并比较了空气-氩ICP和纯氩ICP在不同观察高度的激发温度。测定并比较了两种等离子体在各自最佳操作条件下18个元素55条谱线的信背比。
The 27.12 MHz 2.5 kW HF generator with a crystal controlled oscillator and the Fassel-Scott torch are used to generate a low-flow air-argon plasma (ICP). The cooling air (air) needed to maintain a stable plasma was 8 liters / minute, the auxiliary gas flow (argon) was 2.5 liters / minute and the carrier gas (argon) was 0.7 liters / minute. The minimum plasma power necessary to maintain the R.F. power is about 1000 watts. Compared with the pure argon ICP, the air-argon ICP has a smaller overall size and the location of the best observation analysis zone is lower. This work measured and compared the excitation temperatures of air-argon ICP and pure argon ICP at different observation heights. The signal-to-background ratios of 55 lines of 18 elements under the optimum operating conditions of the two plasmas were measured and compared.