Follow the same standardization steps as described in USP <788>
標準制定遵從USP <788>制定步驟
• Volume accuracy
體積
• Flow rate
流速
• Sensor resolution
傳感器靈敏度
• Calibration
校準
• Count accuracy
計數
Two system controls tests are recommended
兩種系統控制測試
• Blank test: measure five aliquots of degassed particle-free water, the count must be less than 1 particle/mL > 10 µm.
測試:檢測脫氧純水,> 10 µm的粒子數不得超過1 個/mL
• System suitability verification; analyze the USP particle count reference standard and pass the count limits
系統適應性驗證:檢測分析USP標準粒子并低于限定值
Sample preparation
樣品準備
• If there is enough volume test individual units
確認每個樣品是否有足夠的體積
• If the volume is too small, mix units and combine the contents to obtain the required volume (typically 0.2-5.0 mL)
如果體積太小,將樣品混合直到符合測量的體積(典型0.2-5.0 mL)
• Degas the sample and gently mix again
輕輕上下晃動混合均勻
Analysis
• Analyze four aliquots
測量4次
• Count the particles in the size range of interest, including >10 & 25 µm
測量計數規定范圍內的粒子,包括>10 跟 >25 µm。
• Disregard the first result and average the second two
*次不計,求得后面兩次的平均值
Pass/Fail criteria
If the container volume < 100 mL; less than 6000 particles/container > 10 µm and 600 particles/container > 25 µm
通過/不通過的標準范圍
如果標示裝量< 100 mL;> 10 µm 不超過6000個/瓶,> 25 µm 不超過600個/瓶
If the container volume > 100 mL; less than 25 particles/mL > 10 µm and 3 particles/mL > 25 µm. Also not exceed the per container limits for the < 100 mL criteria above.
如果標示裝量> 100 mL,>10 µm 不超過25個/ml,> 25 µm 不超過10個/ml
The AccuSizer FX Nano system is ideal system for performing the USP <787> test for the following reasons
AccuSizer FX Nano是測量USP <787>的*選擇。
• Passes all standardization and system suitability tests
通過所有標準粒子與系統適應性測試
• Sensitivity down to 0.15 µm
靈敏度可以達到0.15 µm
• Higher concentration limit
可檢測高濃度樣品
• Accurate sample volume down to 250 µL
小測量體積為250 µL
Aggregated IgG protein before and after filtration as measured on the AccuSizer FX Nano
AccuSizer FX Nano關于聚合免疫蛋蛋白經過濾和未過濾的檢測譜圖