【摘要】 <正> 一、引言 进行微量水中氘含量的质谱分析,通常采用金属铀在600～700℃下将水还原成氢气的方法。此法反应快而且完全,但由于水蒸汽的吸附可能产生较大的仪器记忆效应,而且金属铀屑在高温下与水汽反应生成的氧化物粉末容易播散造成放射性污染,因而使其应用受更多还原

【Abstract】 A new reducing agent Mg-Pt has been prepared for the conversion of small quantities of water to hydrogen in a flame-sealed borosilicate glass tube at 400℃ for iso-topic analysis. The working curves of gas chromatograph are given from 1.05 ppmD to 99.755 atom %D. The δ (‰) values of the tap water of Peking University and three other reference samples referred to a provisional working standard were measured by a MAT-250 mass spectrometry. The δ value of the tap water of Peking University was found to be -4.98±0.86(n =4), corresponding to its deuterium content of 145.81±0.37 ppm.更多还原