Abstract: Objective To study the stability of tetramine in blood samples under different environment tempera-tures.Methods The tetramine samples in 0.5 μg/mL concentration were stored in the environment temperature at 45 ℃,25 ℃ and 4 ℃.The tetramine concentration were measured by GC-MS in 1,3,12,18 and 39 days,respectively.And then the results of measurement were analyzed by SPSS software.Results At 45 ℃ and 25 ℃,the concentration of tetramine changed without distinctly in first 3 days and declined significantly from 4 days to 12 days.Thereafter it declined more slowly.At 4 ℃,the concentration of tetramine changed without distinctly in 12 days and declined significantly from 13 days to 18 days.Thereafter it declined more slowly.Conclusion The concentration of tetra mine in blood samples is stable in 3 days.Thereafter it declined gradually.Temperature also influences the concentration of tetra mine.

Key words: forensic toxicology, tetramine, stability, blood samples