TABLE 3.

Unstable eicosanoids in different matrices under various storage conditions^a

Storage condition	Autosampler at 4 °C	Freeze-thaw three cycles at −20°C	Bench-top at room temperature			Long-term stability at −20°C			Long-term stability at −80°C
Matrix	Extracted matrix	Original matrix	Original matrix		Extracted matrix	Original matrix	Extracted matrix		Original matrix
Time	Up to 24 h	Up to 3 cycles	Up to 2 h	Up to 8 h	Up to 4h	Up to 180 days	Up to 3 days	Up to 7 days	Up to 180 days
Stock solution	8 and 27	17 and 42	All stable	16 and 41	NA	16 and 41	NA	NA	16 and 41
Serum	8 and 27	3, 15, 16, 18, 33, 36, 41, 42, 43 and 44	3, 15, 16, 41 and 42	3,15, 16, 18, 22, 33, 39, 41, 42, 43, 27 and 44	All stable	15,16, 18, 22, 33, 36, 38, 41, 42, 43 and 44	15, 16	1, 14, 15, 16, 33, 34 and 41	NA

^aAnalytes with >20% loss by the reported time intervals under different storage conditions are presented.