Characteristic Features from SEM Analyses for Delamination Controlled Quality for 24 Weeks at 40 °C
| Area | Citrate Buffer, pH 6.0 | Phosphate Buffer, pH 7.0 | Sodium Bicarbonate |
|---|---|---|---|
| Wall near bottom | No feature found | Reaction zones (about 30 nm) Micro-roughness | Micro-roughness |
| Mid-body | No feature found | No feature found | No feature found |