chemical indicator
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chemical indicator — any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow … Universalium
Indicator — may mean:* pH indicator, a chemical detector for protons in acid base titrations * Redox indicator, a chemical detector for redox titrations * Complexometric indicator, a chemical detector for metal ions in complexometric titrations * Zeta… … Wikipedia
Chemical biology — is a scientific discipline spanning the fields of chemistry and biology that involves the application of chemical techniques and tools, often compounds produced through synthetic chemistry, to the study and manipulation of biological systems.… … Wikipedia
Chemical imaging — (as quantitative chemical mapping) is the analytical capability to create a visual image of components distribution from simultaneous measurement of spectra and spatial, time informations.[1][2] The main idea for chemical imaging, the analyst may … Wikipedia
Chemical oceanography — is the study of ocean chemistry: the behavior of the chemical elements within the Earth s oceans. The ocean is unique in that it contains in greater or lesser quantities nearly every element in the periodic table. Much of chemical oceanography… … Wikipedia
indicator — ► NOUN 1) a thing that indicates a state or level. 2) a gauge or meter of a specified kind. 3) a flashing light on a vehicle to show that it is about to change lanes or turn. 4) Brit. an information board or screen in a railway station, airport,… … English terms dictionary
indicator — [in′di kāt΄ər] n. 1. a person or thing that indicates; specif., a) any device, as a gauge, dial, register, or pointer, that measures or records and visibly indicates b) an apparatus that diagrams the varying fluid pressure of an engine in… … English World dictionary
Chemical oxygen demand — In environmental chemistry, the chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water. Most applications of COD determine the amount of organic pollutants found in surface water (e.g.… … Wikipedia
indicator */*/ — UK [ˈɪndɪˌkeɪtə(r)] / US [ˈɪndɪˌkeɪtər] noun [countable] Word forms indicator : singular indicator plural indicators 1) something that shows you what condition something is in economic indicators such as the inflation rate or the exchange rate a… … English dictionary
Indicator telegraph — Telegraph Tel e*graph, n. [Gr. ? far, far off (cf. Lith. toli) + graph: cf. F. t[ e]l[ e]graphe. See {Graphic}.] An apparatus, or a process, for communicating intelligence rapidly between distant points, especially by means of preconcerted… … The Collaborative International Dictionary of English
