摘要
采用密闭的取样系统吸收电子级NF_3中金属杂质,利用电感耦合等离子体质谱法(ICP—MS)测定了吸收液的金属杂质含量。结果表明:该方法测定电子级NF_3中金属杂质含量的相对标准偏差≤3.09%,NF_3中各项金属杂质含量远远低于指标3×10–9。
A closed sampling system was used to absorb the metal impurities in the electronic grade NF_3. The content of metal impurities in the absorption liquid was determined by using the inductively coupled plasma mass spectrometry(ICP-MS). The results show that the relative standard deviation of metal impurities content in electronic grade NF_3 is not more than 3.09%, and the content of various metal impurities in NF_3 is much less than the index value 3×10~(–9).
引文
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