Tips to make better use of the GMP+ Monitoring database

04 czerwca 2016

Following user experiences and questions, we have gathered a number of tips for you, regarding the use of the GMP+ Monitoring database.


Where possible, the GMP+ Monitoring database uses the same units as GMP+ BA1 Specific feed safety limits making it simple to compare the analysis result with the limits applicable within GMP+. If your analysis result uses a different unit than the GMP+ Monitoring database requires, you will first have to convert the analysis result. So, when entering the analysis results, check carefully whether your results are reported in the same units as those required by the GMP+ Monitoring database.

Tip: Did you know that GMP+ International has a useful conversion tool? This unit calculator helps you convert from ppb to mg/kg for instance. You’ll find the unit calculator in the block ‘related items’ in the GMP+ Monitoring database.

Detection limit

When you ask a laboratory to analyze a sample, it is of course necessary to select a suitable method that is at least accurate enough to establish whether or not the values detected meet the limit. This accuracy can be recognized by a low detection limit. A detection limit is the lowest concentration of a substance that can be measured with the laboratory equipment used. You can recognize the detection limit by an analysis result that it reported as < (smaller than symbol) followed by a number.

Tip: Please carefully check whether the detection limit is low enough to be able to test whether the analysis result beets the limit. If the detection limit is not low enough, please consult with your laboratory about a more suitable analysis method.

Analysis basis

In GMP+ BA1 Specific feed safety limits you can see with what analysis basis you are to compare your product with the limit (and must enter into the GMP+ Monitoring database). The majority of the limits is set at a moisture level of 12% (so 88% dry substance). If your product has a moisture level other than 12%, you will have to convert your analysis result to a moisture level of 12%. In particular, in very moist products, this may affect the ability to meet the feed safety limits. For conversion to the proper moisture level (in case of manual entry of analysis results) you can use the option of entering the moisture level of your product, for automatic conversion.

Tip: Of course you can also ask your laboratory to report the analysis result in the proper analysis basis.

Check before you finalize and share

Carefully check the results you entered before finalizing them. Did you use the correct unit and analysis basis? Does the detection limit match the feed safety limits? Afterwards, you can finalize the results and share them with the GMP+ Community. Please note: after finalizing, it is no longer possible to adjust the results (not even by GMP+ International), so make sure to carefully check the analysis results entered before you finalize the sample.

More general information about the GMP+ Monitoring database, the manual and Q&A list  is available here.

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