Multi-reception strontium isotope quantitative ratio one-shot mass spectrographic analysis method and apparatus

An improvement on mass-spectrography of Sr isotopes features that in multi-receiving mass-spectrometer, 4 receivers are used for 4 jump scanning, that is, the masses numbers received by 4 receivers are 84, 85, 86 and 87 for the first time, 85, 86, 87 and 88 for the second time, 86, 87, 88 and 89 for the third time and 86.5, 87.5, 88.5 and 89.5 for the fourth time. The received 16 signals are usedto express the special relation between known quantity and unknown quantity by array Aij. With the relation formula for single-receiving analysis the ratio of isotopes for sample to be measured is obtained. With said way, the measurement of Sr isotopes ratio and contents can be completed once.