Not sure why you say that. If somebody was to market a test for endocrine disruptors and persistent organic pollutants they would have to specify what you are testing for, what thresholds to use, etc.
They were asking about any test at all. The answer kind of muddies the problem by implying it is harder than it seems, except the current situation is nothing exists at all. The stated problem was not at all that it wasn't qualitatively adequate.
