qfm
第3楼2007/12/03
应为XRF的结果
sunrain001
第8楼2007/12/05
整段文章如下:
Representative analytes
42. Where practicable, each determination system should be calibrated with all the targeted analytes for every batch of analyses. If this requires a disproportionately large number of calibrations, the determination system must be calibrated with a minimum number of representative analytes. Reliance on
representative analytes is associated with an increased risk of incorrect results, especially false negatives. Therefore representative analytes must be chosen very carefully, to provide enough evidence that acceptable screening is achieved
for all other analytes. The choice should be made according to the probability of finding residues in the sample and the physicochemical characteristics of the analytes i.e. analytes likely to give the poorest and most variable response. The representative analytes to be calibrated in each batch must be at least 15 plus
25% of the total number of analytes included in the analytical scope of the determination system. For example, if the analytical scope covers 100 analytes, the detection system must be calibrated with at least 40 representative analytes.
If the scope of analysis in determination system is less than 15, then all analytes should be calibrated. Representative analytes must include those for which the worst performance is expected.
43. Where an analyte that is not a representative analyte is detected in a sample, the result must be considered tentative until calibrated . When the screening result indicates that an MRL might be exceeded, or in the case of other violative residues, the sample must be re-analysed and accompanied by acceptable recovery of the detected analyte.
sunrain001
第9楼2007/12/05
根据您提供的解释和原文When the screening result indicates that an MRL might be exceeded, or in the case of other violative residues,我觉得这里的violative residue是不是指的是违背其他相关规定的残留量?除了MRL,是不是应该还有别的什么关于残留量的规定
只是screening result 究竟是什么结果还不是很清楚,多次实验之后确定下来的结果?可既然已经多次实验了,为什么还要复检(见上贴原文)呢?