Internal standard is added, impure elements are determined by spark source mass spectrometry single exposure method.
定量加入内标，利用火花源质谱单曝光法测定杂质元素。
A formula is deduced to calculate the contents (absolute or relative) of some elements in a sample by internal standard method with the aid of relative sensitivity factors.
具体给出了用相对灵敏度因子的内标法确定样品中各元素(绝对或相对)含量的计算公式。
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