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|
Storage conditions
|
Concentration (ng/mL)
|
Accuracy ± SD (%)
|
RSD (%)
|
|---|
|
Ambient temperature for 24 h
|
15
|
92.22 ± 6.02
|
6.53
|
|
400
|
99.24 ± 4.32
|
4.35
|
|
800
|
108.98 ± 3.63
|
3.33
|
|
At -20 °C for 60 days
|
15
|
104.21 ± 7.62
|
7.31
|
|
400
|
102.35 ± 6.54
|
6.39
|
|
800
|
110.02 ± 3.84
|
3.49
|
|
At 4 °C in the autosampler for 24 h
|
15
|
106.26 ± 5.43
|
5.11
|
|
400
|
108.49 ± 1.98
|
1.83
|
|
800
|
99.63 ± 7.67
|
7.70
|
|
3 Freeze-thaw cycles
|
15
|
93.02 ± 3.78
|
4.06
|
|
400
|
97.85 ± 5.30
|
5.42
|
|
800
|
101.73 ± 6.87
|
6.75
|
