In early tests with the ligand 2-(2-Thiazolylazo)-p-cresol (TAC), we found that interference of the Fe(TAC) 1 complex may have competed with Fe(TAC) 2 for Fe. Also, i pmax was not reached in UV treated seawater after overnight equilibration ([TAC] = 40 Î¼ m, Î± Fe 3 + (TAC) 2 = 3.6 Ã 10 13).
BASE UNIT - kilogram (kg) - MASS. The standard for the kilogram is a cylinder of platinum-iridium alloy kept by the International Bureau of Weights and Measures in Paris. A duplicate at the National Bureau of Standards serves as the mass standard for the United States.
Metric units of mass. Mass is measured in grams (g), kilograms (kg) and tonnes. These are known as metric units of mass. 1 kg = 1000 g. 1 tonne = 1000 kg. Remember when estimating mass: 100g is about the mass of a small apple.1 kg is the mass of a bag of sugar or a litre of water.etric units of mass. Mass is measured in grams (g), kilograms (kg) and tonnes. These are known as metric units of mass. 1 kg = 1000 g. 1 tonne = 1000 kg. Remember when estimating mass: 100g is about the mass of a small apple.