Abstract

A method of chromatography–mass spectrometry is used to study the impurity composition of arsine synthesized by the reaction of arsenic chloride with sodium borohydride. Capillary adsorption columns with adsorbents modified silica and polytrimethylsilylpropine is used for the separation of impurities. Impurities are identified by comparing their mass spectra with the NIST database, published data, as well as by reconstructing their structures from fragment ions. Impurities of permanent gases; saturated and unsaturated hydrocarbons C₁–C₆; chlorinated, oxygenated, and aromatic hydrocarbons; volatile inorganic hydrides; and alkyl derivatives of arsine, trimethyl fluorosilane, carbon sulfur dioxide, and dimethyl sulfide are identified in arsine. Mass spectra of C₂H₃AsH₂, CH₃AsHC₂H₅, and C₂H₅As₂H₃ impurities are obtained for the first time.

中文翻译：

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色谱-质谱法鉴定高纯P中的杂质

摘要

采用色谱-质谱法研究了氯化砷与硼氢化钠反应合成的rs的杂质组成。毛细管吸附柱采用吸附剂改性的二氧化硅和聚三甲基甲硅烷基丙氨酸进行杂质分离。通过将杂质的质谱图与NIST数据库，已发布的数据进行比较，以及通过碎片离子重建其结构，可以识别杂质。永久性气体杂质；饱和和不饱和烃C ₁ –C ₆；氯化，氧化和芳香烃；挥发性无机氢化物；在rs中鉴定出，三甲基氟硅烷，二氧化硫碳和二甲基硫的烷基衍生物。C _2的质谱首次获得H ₃ AsH ₂，CH ₃ AsHC ₂ H ₅和C ₂ H ₅ As ₂ H ₃杂质。