- 行业: Printing & publishing
- Number of terms: 178089
- Number of blossaries: 0
- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
The number of carbon atoms in a material under analysis; plotted against chromatographic retention volume for compound identification.
Industry:Chemistry
A device to measure and record the weight of sediment (solid particles settled out of a liquid) versus time; used to determine particle sizes of fine solids.
Industry:Chemistry
A form of gas-liquid chromatography in which the eluting solvent is changed with time, either by gradually mixing a second solvent of greater eluting power with the first, less powerful solvent, or by a gradual change in pH or other property.
Industry:Chemistry
A faithful carbon-film, mold of a specimen surface (for example, powders, bones, or crystals) which is thin enough to be studied by electron microscopy.
Industry:Chemistry
The equilibrium between the forward movement of a sample’s liquid-sediment boundary and reverse diffusion during centrifugation; used in molecular-weight determinations.
Industry:Chemistry
A method of measuring the moisture content of a gas in which a known volume of gas is passed through a suitable desiccant, such as phosphorus pentoxide or silica gel, and the change in weight of the desiccant is observed.
Industry:Chemistry
In gas chromatography, a gas used as an eluant for extracting the sample from the column as the gas passes through. Also known as eluant gas.
Industry:Chemistry
The rate of movement of the liquid-sediment boundary in the sample holder during centrifugation; used in molecular-weight determinations.
Industry:Chemistry
That branch of quantitative analytical chemistry in which a desired constituent is converted, usually by precipitation or combustion, to a pure compound or element, of definite known composition, and is weighed; in a few cases a compound or element is formed which does not contain the constituent but bears a definite mathematical relationship to it.
Industry:Chemistry
