而MRPL,即Minimum Required Performance Limit首字母缩写,通常所说的欧盟制定的最低残留限量就是指这个,说白了,贸易壁垒/技术壁垒!
“The MRPL represents the minimal concentration of the banned substance in question that must be able to determine with specified degrees of accuracy and precision by an analytical method and is based on the current limit of detection (LOD).”
——来源cuturl('http://www.coextra.eu/news/news1257.html')
同时, 欧盟官方指南文件(EUROPEAN COMMISSION,HEALTH & CONSUMER PROTECTION DIRECTORATE-GENERAL GUIDELINES FOR THE IMPLEMENTATION OF DECISION 2002/657/EC)上明确说明:
“ It should be noted that the minimum required performance level is not the MRPL. The minimum required performance level is the lowest concentration of analyte which is expected to be detected (screening methods) or its identity unequivocally confirmed (confirmatory methods). It follows that for substances for which an MRPL has been proposed, the minimum required performance level should be less than the MRPL.
It is therefore recommended that representative blank material must be used, which is fortified at and above the minimum required performance level. The lowest calibration point is that at which the method starts to detect or identify the analyte. (This does not mean that the method should detect or identify the analyte in 100 % of the cases).
It should be noted that the two approaches are only valid for a linear curve and therefore linearity has to be proven in order to use these approaches.”