Table 6.
Stability results for GlcNAc and GalNAc standard solutions after ten days at 4, 20, and 40°C (n = 5 independent replicates).
| Compound | STa | FCb | Stability (n = 5, mean) (°C) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day 1 | Day 2 | Day 3 | Day 7 | Day 10 | ||||||||
| ASc | RSDd | ASc | RSDd | ASc | RSDd | ASc | RSDd | ASc | RSDd | |||
| GlcNAc | 4 | 25 | 100.16 | 0.04 | 98.32 | 0.28 | 102.16 | 0.77 | 104.72 | 0.52 | 104.20 | 1.54 |
| 150 | 99.72 | 1.04 | 101.84 | 0.27 | 101.59 | 1.25 | 100.33 | 0.28 | 102.00 | 0.80 | ||
| 20 | 25 | 98.32 | 3.32 | 98.76 | 3.60 | 99.64 | 2.92 | 102.64 | 1.85 | 96.20 | 3.99 | |
| 150 | 99.72 | 1.11 | 99.69 | 0.83 | 101.79 | 0.79 | 101.49 | 1.29 | 102.21 | 0.75 | ||
| 40 | 25 | 102.36 | 3.27 | 103.44 | 2.65 | 101.72 | 3.73 | 104.56 | 0.66 | 104.16 | 1.74 | |
| 150 | 101.99 | 1.12 | 102.88 | 0.46 | 102.30 | 0.15 | 101.84 | 0.43 | 97.99 | 1.34 | ||
|
| ||||||||||||
| GalNAc | 4 | 10 | 103.50 | 1.81 | 102.50 | 1.23 | 103.70 | 2.79 | 105.70 | 0.20 | 103.10 | 4.64 |
| 100 | 98.58 | 1.11 | 98.54 | 0.42 | 105.04 | 0.38 | 104.86 | 0.53 | 101.25 | 0.49 | ||
| 20 | 10 | 98.00 | 1.75 | 103.40 | 3.95 | 105.08 | 3.54 | 102.50 | 1.27 | 105.70 | 3.63 | |
| 100 | 102.36 | 1.05 | 103.53 | 1.08 | 103.05 | 0.78 | 104.24 | 1.14 | 98.68 | 0.37 | ||
| 40 | 10 | 99.00 | 1.08 | 106.50 | 3.83 | 102.10 | 4.98 | 100.90 | 3.84 | 98.40 | 4.37 | |
| 100 | 101.58 | 0.21 | 100.77 | 2.16 | 101.66 | 3.34 | 100.24 | 2.96 | 100.46 | 0.17 | ||
aST = storage temperature (°C).
bFC = fortified concentration (mg/L).
cAS = accuracy of stability test for GlcNAc and GalNAc (%).
dRSD = relative standard deviation (%).