reagentlife
第5楼2012/07/06
下面是国外的回复,国外从2012年4月份开始根据ISO guide 34的更新后的不确定度公式来计算不确定度,通过修正上述批号的数据为1000+/-7.25 mg/L。
The assessment of uncertainty under ISO34 is somewhat complicated and includes elements of uncertainty associated with homogeneity and stability. Last month we implemented a new procedure for calculating uncertainty that has been approved by our ISO34 accrediting company. The new procedure minimizes the value . I will revise the reference certificate to reflect the new procedure. The expanded uncertainty is similar t o our other products.