"Concentration combined uncertainty of alpha-pinene {CAS 80-56-8} per unit volume of the water body [dissolved plus reactive particulate <0.4/0.45um phase] by gas chromatography-mass spectrometry"@en . . "SDN:P01::DCMUC018" . "The combined uncertainty associated with the specified measurement. The method used to estimate uncertainty should be described in the usage metadata."@en . .