Analyzes are done according USPS/EU pharmacopeia standards.
Those standards are internationally accepted ( and reviewed yearly by international experts) to tests all drugs that are released in the international markets.
Normally I should post only first page so if you do not see there REJECTED means product is good. But because I do not want some to say they can not believe or check I post all the pages that show full process and all details, so anytime someone can give to a laboratory for validation.

So if product is tested according to those standards means it has the right concentration and does not have impurities ( other than those accepted by USPS/EU standards ).