- emission flame photometry
- 发射火焰光度法
English-Chinese chemistry dictionary (英汉化学大词典). 2013.
English-Chinese chemistry dictionary (英汉化学大词典). 2013.
Flame test — A flame test is a procedure used in chemistry to detect the presence of certain metal ions, based on each element s characteristic emission spectrum. The color of flames in general also depends on temperature; see flame color.The test involves… … Wikipedia
flame photometer — noun : a spectrophotometer in which a spray of metallic salts in solution is vaporized in a very hot flame and subjected to quantitative analysis by measuring the intensities of the spectrum lines of the metals present • flame photometric… … Useful english dictionary
Atomic emission spectroscopy — (AES) is a method of chemical analysis that uses the intensity of light emitted from a flame, plasma, arc, or spark at a particular wavelength to determine the quantity of an element in a sample. The wavelength of the atomic spectral line gives… … Wikipedia
Photoelectric flame photometer — A photoelectric flame photometer is a device used in inorganic chemical analysis to determine the concentration of certain metal ions, among them sodium, potassium, lithium, and calcium.In principle, it is a controlled flame test with the… … Wikipedia
Potassium-argon dating — or K Ar dating is a radiometric dating method used in geochronology and archeology. It is based on measuring the products of the radioactive decay of potassium (K), which is a common element found in materials such as micas, clay minerals, tephra … Wikipedia
Potassium — (pronEng|pəˈtæsiəm) is a chemical element. It has the symbol K ( la. kalium, from ar. qalīy), atomic number 19, and atomic mass 39.0983. The name potassium comes from the word potash , as potassium was first isolated from potash. Potassium is a… … Wikipedia
Light — For other uses, see Light (disambiguation). Visible light redirects here. For other uses, see Visible light (disambiguation) … Wikipedia
Candela — This article is about the unit of luminous intensity. For other uses, see Candela (disambiguation). Photopic (black) and scotopic[1] (green) luminosity functions. The photopic includes the CIE 1931 standard[2] … Wikipedia
radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… … Universalium
Orion Nebula — The entire Orion Nebula in visible light. Credit: NASA/ESA Observation data: J2000 epoch … Wikipedia
Nicholas Mayall — Nicholas U. Mayall Born … Wikipedia