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将液体试样以气溶胶形式引入等离子焰的发射光谱分析中,其检测下限及谱线选择与背景校正已有不少报导。尽管Greenfield等曾报导了将粉末试样直接引入等离子焰中,但至今尚未看到将粉末试样直接引入等离子焰的有关光谱分析检测下限的完整资料。溶液试样以气溶胶形式引入电感耦合高频等离子焰的发射光谱分析虽具有不少优点,但不少元素,尤其是难挥发元素的相对灵敏度仍然不能满足一些试样的分析要求,实践表明,将粉末试样直接引入等离子焰的发射光谱分析具有快速、简便、成本低,而对大多数元素(尤其是难挥发元素)的相对灵敏度高等优点。以下就本法对67个元素检测限获得过程的标准
In the analysis of the emission spectra of liquid samples introduced into the plasma flame by aerosol, there are a lot of reports about the lower limit of detection and the choice of spectrum and background correction. Although Greenfield et al. Have reported direct introduction of powder samples into the plasma flame, no complete information on the lower limits of spectral analysis for direct introduction of the powder sample into the plasma flame has been observed so far. However, the relative sensitivity of many elements, especially difficult-to-volatile elements, still can not meet the analysis requirements of some samples. Practice shows that the emission spectra of the samples with aerosols induced by inductively coupled high-frequency plasma flame have many advantages, The emission spectrum analysis of the powder sample directly into the plasma flame has the advantages of fastness, simplicity, low cost and high relative sensitivity to most elements, especially the less volatile ones. The following is the law on the detection limit of 67 elements of the standard process