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本文就银基合金中锌、锡、铟、碲四元素的空气-乙炔火焰,原子吸收光谱法测定进行了研究。选择了各元素的测定条件,锌,铟、碲灵敏吸收线,分别为213.8nm、303.nm、214.3nm、224.6nm是锡的灵敏吸收线,但噪声大,稳定性差。我们选用286.3nm,虽然灵敏度稍差,但强度大,噪声小。锌、锡、铟、碲四元素的共振波长大多在短波紫外区,火焰吸收的影响显著,因此要选择合适的空气流量与乙炔流量,仪器测定条件见表1。
In this paper, the air-acetylene flame and atomic absorption spectrometry of four elements of zinc, tin, indium and tellurium in silver-based alloys were studied. The measurement conditions of each element were selected. The sensitive absorption lines of zinc, indium and tellurium were 213.8nm, 303nm, 214.3nm and 224.6nm, respectively. However, they were sensitive absorption lines of tin, but their noise and stability were poor. We use 286.3nm, although slightly less sensitive, but the intensity, noise. The resonance wavelength of the four elements of zinc, tin, indium and tellurium is mostly in the shortwave ultraviolet region, and the influence of flame absorption is significant. Therefore, the suitable air flow rate and acetylene flow rate should be selected.