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The merger between M.A. Hanna Company and The Geon Company in 2000 produced PolyOne Corporation. [2] In 2009, PolyOne was ranked #731 on the Fortune 1000 list and included in the S&P 600 investment index. [3] Hanna was formed in 1885 as a privately held company focused on mining and shipping and became publicly held in 1927. In the mid-1980s ...
Conductivity or specific conductance of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is siemens per meter (S/m). Conductivity measurements are used routinely in many industrial and environmental applications as a fast, inexpensive and reliable way of measuring the ionic content in a ...
Under Hanna, the company expanded into other fields including iron ore mining in the area around Lake Superior. [2] It became Hanna Mining in 1885. Incorporation took place in 1922 and was named as the M.A. Hanna Company. In 1929 the Hanna Company transferred its blast furnaces, coke ovens, and other assets for stock of the National Steel ...
The conductivity of a water/aqueous solution is highly dependent on its concentration of dissolved salts, and other chemical species that ionize in the solution. Electrical conductivity of water samples is used as an indicator of how salt-free, ion-free, or impurity-free the sample is; the purer the water, the lower the conductivity (the higher ...
An electrical conductivity meter. An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. [1] It has multiple applications in research and engineering, with common usage in hydroponics, aquaculture, aquaponics, and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.
This minimum can be used, instead of an indicator dye, to determine the endpoint of the titration. The conductometric titration curve is a plot of the measured conductance or conductivity values as a function of the volume of the NaOH solution added. The titration curve can be used to graphically determine the equivalence point.
PEDOT:PSS can be prepared by mixing an aqueous solution of PSS with EDOT monomer, and to the resulting mixture, a solution of sodium persulfate and ferric sulfate. [3] [4] The addition of these reagents initiates the oxidative chemical polymerization of EDOT in water to form PEDOT. [5]
Ironton Sintering Plant Complex is a group of buildings north of Crosby, Minnesota, United States, listed on the National Register of Historic Places.The plant was built in 1924 by the Hanna Mining Company to sintering iron ore mined in the Cuyuna Range.