Chromatography Research International / 2011 / Article / Tab 4 / Research Article
Determination of Glucosamine in Human Plasma by High-Performance Liquid Chromatography-Atmospheric Pressure Chemical Ionization Source-Tandem Mass Spectrometry Table 4 Stability of glucosamine in human plasma at three QC concentrations (
š
=
3
).
106.5āng/mL 852.3āng/mL 3409āng/mL Determined mean concentration R.S.D. Mean accuracy (%) Determined mean concentration R.S.D. Mean accuracy (%) Determined mean concentration R.S.D. Mean accuracy (%) (ng/mL) Ā± S.D. (ng/mL) Ā± S.D. (ng/mL) Ā± S.D. Short-term stability
9
5
.
2
Ā±
3
.
7
3.86 89.4
9
1
9
.
3
Ā±
1
9
.
6
2.13 107.8
3
1
4
5
Ā±
7
5
.
7
2.40 92.2 Postpreparative stability
9
7
.
9
Ā±
1
.
2
1.26 92.0
8
3
8
.
8
Ā±
3
9
.
8
4.75 98.4
3
0
4
7
Ā±
1
0
7
.
7
3.53 89.4 Freeze-thaw stability
1
1
1
.
1
Ā±
1
0
.
7
9.62 104.3
8
7
1
.
2
Ā±
2
7
.
9
3.20 102.2
3
0
9
1
Ā±
7
8
.
4
2.53 90.7 Long-term stability
1
0
0
.
5
Ā±
4
.
0
3.40 94.4
8
5
1
.
4
Ā±
2
5
.
6
3.01 99.9
3
1
1
5
Ā±
3
8
.
6
1.24 91.4
