【摘要】 获得了金属、合金、半导体、绝缘体和溶液等各种类型样品的负离子质谱,总结出谱线强弱的规律,发现负离子质谱具有谱线简单、没有多价离子谱线,分辨率高、以及非金属元素具有很高的相对离子产率等优点,可以有利地用于硫、硅、及卤族元素的测定,并且可以为化学分析提供更多的信息。采用硼砂基体法成功地解决了溶液样品的电极制备问题。测得氟、氯、溴、碘在硼砂基体中的检出极限为2×10^-5。检出极限与卤素的存在形式有关。更多还原

【Abstract】 Negative ion mass spectra were taken of various types of samples--metals, alloys, semiconductors, insulators and solutions. Regularities of line strengthwere summarized on this basis. Such favorable specialities of negative ion massspectra as simplicity, absent of multicharged ions, high resolution and high re-lative ion yield for nonmetal elements have been used with advantage in chemi-sal analysis. Difficulties encountered in the preparation of electrodes for solu-tion samples were overcome by using borax as matrix. Detection limits of fluo-rine, chlorine, bromine and iodine in borax matrix were determined to 2×10^-5 andcound to be dependent on the chemical form of the species,更多还原