利用发射光谱可以对纯金属中的许多杂质元素进行分析。但是对那些不宜做成棒状电极的纯金属试样,就只能用其氧化物,或碎屑压块,或研成粉末装入碳电极进行分析,这时常常要求使用直流电弧。为此,我们对WPG-100型摄谱仪所带的交流发生器进行了简单的改装,只增添少量元器件,即可将单用的交流发生器改为交直流两用发生器,扩大了仪器的分析适应能力。 Emission spectra allow the analysis of many impurity elements in pure metals. However, for those pure metal samples that are not suitable for rod-shaped electrodes, they can only be analyzed by using oxides, or chip briquettes, or powdered carbon electrodes, often requiring the use of DC arcs. For this reason, we have carried on the simple modification to the alternator brought by the WPG-100 spectrograph, and changed the single-purpose alternator into AC-DC generator with only a few components Instrument analysis adaptability.