I breifly looked into this a while back cGMP stands for Current Good Manufacturing Process. If I am on the right page with this, this article is more targeted towards government labs trying to use manufacturing process that is validated by cGMP. This is targeted towards clinical research and FDA approved studies. I think its overkill but might be some good knowledge within that article. I have noticed many people into this type of "hobby" do not care about dumping mercury at their favorite old forest they remembered as a kid. I think we should all discourage use of mercury. Merc bad.