Petroleum products and used oils. Determination of polychlorinated biphenyl (PCB) and related products. Part 1. Separation and determination of selected PCB congeners by gas chromatography (GC) using an electron capture detector (ECD)
State system for ensuring the uniformity of measurements. Relative dielectric permittivity the loss tangent of solid dielectrics. Procedure of measure from 10 in 9 degree to 10 in 10 degree Hz
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