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8.3.3 Stamps 邮戳法
In this exceptionally used sampling method, “coins” (or stamps) are placed on appropriate sampling points in the equipment during the manufacture of the previous product and during cleaning. After cleaning, the contamination on the coins can be analysed and the overall contamination can be calculated by extrapolation to the whole equipment. For quantitation, the coins may be firstly swabbed followed by further analysis of the samples.
这是一种在例外情况下使用的取样方法。取一个“圆片”(或邮票),置于设备中适当的取样点上,进行上一产品的生产及清洁。在清洁后,对硬币上的污染物进行检测,采用外推法计算整个设备的全部污染。如果是要进行定量分析,则对圆片进行擦拭取样,然后对样品进行进一步分析。
here is also mentioned a third method which is rather unknown - the so-called "stamps" or "coins". These elements are placed on appropriate sampling points in the equipment and remain there during the manufacture of the previous product and during cleaning. After cleaning, the contamination on the coins is analysed and the overall contamination is calculated.
文中还提到第3种较少为人知的方法,称为“印章”或“硬币”法。该方法是将一个“硬币”贴在设备取样点,进行上一产品的生产和清洁,在清洁后,对“硬币”上的清洁物进行分析,计算整体污染水平。
这种“stamp”方法大家有用过吗???求介绍!谢谢!
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