Niven is generally used as a boy's name. It consists of 5 letters and 2 syllables and is pronounced Ni-ven. In the U.S. in 2014, it ranked 11650 in baby name popularity for boys with 6 occurrences.
POLYCHLORINATED BIPHENYLS (PCBs) BY GAS CHROMATOGRAPHY. 1.0 SCOPE AND APPLICATION. 1.1 Method 8082 is used to determine the concentrations of polychlorinated biphenyls. (PCBs) as Aroclors or as individual PCB congeners in extracts from solid, tissue, and aqueous. matrices, using open-tubular, capillary columns with electron capt ure detectors (ECD) or electrolytic. conductivity detectors (ELCD).
There were nine common PCB Aroclor mixtures (1221, 1232, 1242, 1016, 1248, 1254, 1260, 1262, and 1268), and each of them has a distinctive gas chromatographic pattern. Measuring PCBs as Aroclors relies on there being a relatively fixed composition of PCB congeners in the mixture.hen a chemist measures the amount of Aroclor in a sample, they will know the total amount of that Aroclor that is present, but will not know the identity or the concentration of the specific PCB congeners in the sample.