Total organic caibon

Not needed for nonspecific analytical methods (e.g., total organic caibon). All of the compound detected must be attributed to the target analyte unless rationale supporting an alternative has been documented, "in cases where reproducibility has been performed, intermediate precision is not needed. 

Total organic caibon Not more than 0.5 ntg/mi Cf. Tots ... 

The catalysts studied were characterized using XFA, TEM, XANES, EXAFS, XPS, and liquid nitrogen physisorption methods. The total organic caibon was detected by standard methodology of chemical oxygen demand (COD). 

To this purpose, isotopic data presented in this paper were obtained from several selected Gorleben groundwaters as part of the colloid characterisation programme. The contents of major and minor ions, light isotopes ( H, H, and and the U/Th isotopes were measured. Radiocarbon and were measured in dissolved inorganic carbon (DIG), ion the humic acid (HA-colloids) and fulvic acid (FA-solution) fractions of dissolved organic caibon (DOC). The and were also determined in dissolved sulphate phase. The U/Th isotope measurements were carried out on total and surface solid phases, colloid fraction (1-1000 nm particle size, HA) and solution (<1.5 nm, FA). 

Theoretically, an infinite numbei of different caibon compounds can exist. Carbon atoms alone or in combination with other atoms, such as oxygen, nitrogen, etc., can join to form linear, branched, and cyclic chains of nearly any length. One, two, or three bonds may be shared between two carbon atoms. In most stable organic compounds, the total number of bonds to each carbon atom is four. 

---