LPG

19:02 Nov 19, 2017 

Cannot be sure, but I think the G is groupe. From the description, LPG refers to "recommended concentrations" set by Community Reference Laboratory (CRL, now EURL) groups. "Group performance limit" is weird, though. Unfortunately, this is in the table, so you can't avoid it. Can you define LPG = EURL recommended concentration, and leave it?

[PDF download] [from 2007]
http://www.bvl.bund.de/SharedDocs/Downloads/09_Untersuchunge...
It needs to be emphasised that this document is to serve as technical guidance for analytical methods in residue control. The recommended concentrations in this document have no legal force. MRPLs, on the other hand, serve according to Commission Decision 2005/34/EC as reference points for action irrespective of the matrix tested.

https://www.researchgate.net/publication/260202223_Stability...
The Community Reference Laboratories proposed 20 µg kg–1 as the recommended concentration for screening for tetracyclines in honey.6 Romania has adopted this action level as an acceptable limit for tetracycline residue detection in honey.

18:53 Nov 18, 2017 

Correction: LPG is probably not like method detection limit.

https://www.wada-ama.org/sites/default/files/resources/files...
The MRPL is an analytical parameter of technical performance with which the Laboratories shall comply when testing for the presence of a particular Prohibited Substance, its Metabolite(s) or Marker(s). The MRPL is the concentration of a Prohibited Substance or Metabolite of a Prohibited Substance or Marker of a Prohibited Substance or Method that Laboratories shall be able to routinely detect and identify.
 The MRPL is not a threshold (T) nor is it a Limit of Detection (LOD).

18:16 Nov 18, 2017 

I didn't find anything in the ST that would indicate what this is. I think Charles is on the right path with limite de performance __.
From the description, this is similar in concept to method detection limit (MDL), but it's probably not exactly, since this is very specifically defined and American, whereas Minimum Required Performance Limit (MRPL) is EU.

http://www.sciencedirect.com/science/article/pii/S0021967306...
A multiresidue method suitable for confirmation and determination of six sulfonamides (SAs), three tetracyclines (TCs), and pyrimethamine (PYR) in cow milk was validated... Estimated method detection limits (MDL) and method quantitation limits (MQL) ranged from 0.48 to 2.64 and 0.61 to 8.64 ng/mL, respectively. These values are far lower than the maximum residue limits (MRLs) established by several control authorities.

13:44 Nov 18, 2017 

Wouldn't be glucocorticoid performance limit, would it?

11:59 Nov 18, 2017 

That does spring to mind, but I can't find any confirmation.

They say "que nos appellerons LPG", which suggests that it's an initialism of their own that is not in general use, so it may not have an English equivalent. It seems very sloppy to introduce it without saying what it stands for, and the explanation is not very enlightening. The definition "limite analytique non basé sur toxicologie mais sur capacité de détection des méthodes" is exactly the same as the one given for LPMR (= MRPL) in the previous section, but for some reason they are using a different one for veterinary medical products.

It seems to denote a performance limit according to the method developed by each individual laboratory ("pour laquelle chaque laboratoire européen doit pouvoir développer sa méthode d’analyse de référence"). Maybe the G corresponds to that concept, but I can't think of a word beginning with G that would express it.

11:41 Nov 18, 2017 

General??? Just putting stuff out there!

11:27 Nov 18, 2017 

CCα / CCβ Decision Limit / Detection Capability
MRL Maximum Residue Limit
MRPL Minimum Required Performance Limit
http://ec.europa.eu/food/fvo/act_getPDF.cfm?PDF_ID=12366 p. 4

11:18 Nov 18, 2017 

I think the LP has got to be limite de performance (performance limit), but what's the G? It must stand for something; they surely didn't just put a random letter!

11:15 Nov 18, 2017 

I've just quoted the same document at greater length in my reference. That's where the answer lies, but I don't know what it is.

11:09 Nov 18, 2017 

I've just found this explanation much further on in the document (although it fails to tell me what it stands for!!) Ce document a pour vocation de fixer une valeur minimale de performance analytique en confirmation pour laquelle chaque laboratoire européen doit pouvoir développer sa méthode d’analyse de référence (limite analytique non basé sur toxicologie mais sur capacité de détection des méthodes) que nous appellerons LPG