JIS K 0312:1999

This Japanese Industrial Standard specifies the method of analysis for tetra-through octa-chlorodibenzo-para-dioxins, tetra-through octa-chlorodibenzofurans and coplanar PCBs in industrial water and waste water using a gas chromatograph coupled to a mass spectrometer (GC/MS). The GC/MS employed in this Standard shall be the double-focusing mass spectrometer (MS) where the capillary column of a gas chromatograph (GC) is used and its resolution is 10000 or more. The minimum limits of detection of GC/MS in this Standard, though it is liable to vary in accordance with an apparatus or analytical conditions, are 0.1 pg for tetrachlorinated compounds and pentachlorinated compounds, 0.2 pg for hexachlorinated compounds and heptachlorinated compounds, 0.5 pg for octachlorinated compounds and 0.2 pg or less for coplanar PCBs.