Abstract: By using graphite furnace atomic absorption spectrometry, tested the life-time, sensitivity and precision of the PGT, discussed that the PGT's performance was impacted by several different tesing condition, such as the normal state, the over-high atomic temperature state and the impurity state of carry-gas, educed more valuable conclusion about actual application. The tesing condition was limited strictly, so that had more representative by choosing the difficult-melted V as the tested element.