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当前,在地质普查找矿以及地质成矿规律的研究中,对一些元素分析灵敏度的要求达ppb级,需要寻找一种提高分析灵敏度的新途径,以满足地质研究的需要。 1.提高发射光谱分析灵敏度的途径:除了光源和光谱仪的改进以及寻找合适的缓冲剂外,研究试样引进电弧的方式方法也可以提高分析灵敏度。垂直电极法,是较常用的方法,也是一种潜在的方法;水平电极撒料法能提高一些易挥发和中等挥发元素的灵敏度,但因无分馏效应,其组份影响严重;吹样法因沾污问题,实际应用很少。转盘法,由于分馏效
At present, in the prospecting of geological prospecting and the law of geology and mineralization, the requirements for some elemental analysis sensitivity are in ppb level, and a new way to improve the sensitivity of analysis needs to be found to meet the needs of geological research. 1. ways to increase the sensitivity of emission spectroscopy: In addition to the improvements in light sources and spectrometers and the search for suitable buffers, the way in which the sample is introduced into the arc can also improve the analytical sensitivity. The vertical electrode method is a more commonly used method and is also a potential method. The horizontal electrode method can improve the sensitivity of some volatile and moderately volatile elements, but its composition is seriously affected because of no fractionation effect. Pollution problem, practical application rarely. Turntable method, due to fractionation effect