The Choice of Loading Reagents in Tc Negative Thermol Mass Spectrometry

The primary analyse method of ⁹⁹Tc by NTIMS(negative thermol mass spectrometry) is found. For ng scale ⁹⁹Tc sample, the steady ion stream from 2 mV to 14 mV can be achieved when using MgCl₂＋NaOH＋Ca(NO₃)₂ scrawling reagent. This method can be preferably repeated, and has little disturb of other element. It can reach the require of measuring Tc isotope’ ratio.