People are working on it, however it's just very very difficult. Contaminants can have an adverse effect at 1 part per billion, so as you can imagine the sensit

People are working on it, however it's just very very difficult. Contaminants can have an adverse effect at 1 part per billion, so as you can imagine the sensitivity of testing equipment must be very advanced. Currently contaminants can only be reliably detected with advanced equipment like mass spectrometers that run over a hundred thousand, require clean conditions, trained operators, advanced software, and routine upkeep. Improvements in these machines would be a huge step in the right direction.