Analytical chemistry

Analytical chemistry

Industry: Chemistry

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Analytical chemistry

Interference

Chemistry; Analytical chemistry

A systematic error in measurement that occurs when concomitants are present in the sample being analyzed.

Chromatogram

Chemistry; Analytical chemistry

The pattern formed by zones of separated pigments and of colourless substance in chromatographic procedures.

Spectral directional reflectance factor

Chemistry; Analytical chemistry

In spectrophotometric colorimetry, the ratio of the energy diffused in any desired direction by the object under analysis to that energy diffused in the same direction by an ideal perfect (energy) ...

Iodine number

Chemistry; Analytical chemistry

A measure of the iodine absorbed in a given time by a chemically unsaturated material, such as a vegetable oil or a rubber; used to measure the unsaturation of a compound or mixture. Also known as ...

Spectral radiance factor

Chemistry; Analytical chemistry

A situation when the desired directions for analysis of energy diffused from (reflected from) an object under spectrophotometric colorimetric analysis are all substantially the same (a solid angle of ...

Iodine test

Chemistry; Analytical chemistry

Placing a few drops of potassium iodide solution on a sample to detect the presence of starch; test is positive if sample turns blue.

Chromatographic adsorption

Chemistry; Analytical chemistry

Preferential adsorption of chemical compounds (gases or liquids) in an ascending molecular-weight sequence onto a solid adsorbent material, such as activated carbon, alumina, or silica gel; used for ...