The Eleven is real-time analysis for pollution prevention and basically what this means is in many cases you have to follow the course Of a reaction to determine how far along it is when you're monitoring the production and this involves Taking samples taking them to the laboratory and performing destructive analysis that means when you perform the analysis you actually destroy the material and What's coming along quite nicely especially since the 80s 90s and Now into this century is something called real-time analysis where you can actually use modern technology For example a probe that tells you the analytical profile of the material during the course of the reaction in real life So you save the use of the laboratory agents and you also save some yield because you're not taking material out of the reaction space