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. 2015 May 23;5(4):269–275. doi: 10.1016/j.jpha.2015.05.004

Table 3.

Stability of FA and 5-M-THF in plasma under different storage conditions (n=3).

Storage conditions Analytes Concentration levels (ng/mL)
RSD (%) RE (%)
Nominal Determined
FA 0.595 0.580 4.7 −2.6
Residue stability 15.9 16.5 1.4 3.9
(1 h, room temperature) 5-M-THF 12.1 13.2 1.4 8.8
42.4 46.3 1.1 9.1
FA 0.595 0.637 6.2 7.1
Short-term stability 15.9 16.7 3.2 5.3
(7.5 h, room temperature) 5-M-THF 12.1 12.4 0.6 2.1
42.4 44.2 1.3 4.3
FA 0.595 0.587 6.4 −1.4
Freeze/thaw stability 15.9 14.8 0.5 −7.2
(three cycles) 5-M-THF 12.1 12.8 4.5 5.2
42.4 46.0 5.0 8.3
FA 0.595 0.658 6.8 10.6
Long-term stability 15.9 16.9 4.1 6.3
(50 days, −80 °C) 5-M-THF 12.1 10.8 2.6 −10.8
42.4 41.2 4.6 −2.9
FA 0.595 0.617 6.7 3.8
Autosampler stability 15.9 17.2 2.9 8.1
(10 h, 4 °C) 5-M-THF 12.1 12.3 7.8 1.5
42.4 43.1 0.8 1.6
FA 0.595 0.566 6.1 −4.9
Supernatant stability 15.9 16.6 7.9 4.5
(12 h, room temperature) 5-M-THF 12.1 13.0 1.9 7.6
42.4 46.4 3.5 9.4
FA 0.595 0.580 3.5 −2.6
Supernatant stability 15.9 14.8 4.2 −2.0
(24 h, −80 °C) 5-M-THF 12.1 12.3 6.4 1.2
42.4 44.8 3.0 5.6