spectrophotometern.
/ˌspɛktrəfəʊˈtɒmɪtə/ An instrument designed to measure the relative intensity of light (usually transmitted or emitted by a substance under study) at different wavelengths in a particular region of the spectrum.
ΘΚΠ
the world > matter > chemistry > chemical assay or analytical chemistry > [noun] > acetimetry > spectrophotometry > apparatus
spectrophotometer1881
the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > [noun] > instrument used in
spectroscope1861
spectrometer1874
spectrophotometer1881
spectrograph1884
integrating spectroscope1898
X-ray spectrometer1914
milliprobe1963
the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > degree of intensity > instrument
photometer1779
photoscope1872
spectrophotometer1881
light meter1889
Hefner1891
illuminometer1895
luxmeter1910
lumeter1911
telephotometer1915
1881 Nature 6 Oct. 552/2 Photometric comparison of luminous sources of different colours, by M. Crova. He uses a spectrophotometer.
1938 Jrnl. Optical Soc. Amer. 28 18 This spectrophotometer was designed specifically to measure in the visible region the absorption spectrum of visual purple.
1948 Nature 21 Feb. 285/2 Total penicillin may be assayed non-biologically with the aid of the..ultra-violet spectrophotometer.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) II. 594 d/1 The split-beam spectrophotometer..measures the difference in absorption at any given wavelength between two nearly identical cell suspensions.
1976 C. Skegg tr. Welz Atomic Absorption Spectrosc. v. 84 In modern spectrophotometers a logarithmization of the signal takes place within the instrument, so that the readout on the display is already in absorbance and no conversion is required.
Derivatives
ˌspectrophotoˈmetric adj. of, relating to, or employing a spectrophotometer.
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the world > matter > chemistry > chemical assay or analytical chemistry > [adjective] > of specific types > of or relating to spectrophotometry
spectrophotometric1884
the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > [adjective]
spectroscopic1869
spectrographic1884
spectrophotometric1884
spectrometric1891
1884 Boston (Mass.) Jrnl. 13 Sept. A ‘spectrophotometric study of pigments’, by Professor Nicolls.
1942 Astrophysical Jrnl. 96 451 Spectrophotometric observations of the light of the night sky have been made for the stronger lines of the visual region of the spectrum.
1977 I. M. Campbell Energy & Atmosphere ix. 307 (caption) Concentration profile of O2..versus altitude in the upper mesosphere, measured by rocket-borne spectrophotometric detection.
ˌspectrophotoˈmetrically adv.
ΘΚΠ
the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > [adverb]
spectrophotometrically1897
spectrographically1900
spectrometrically1953
the world > matter > chemistry > chemical assay or analytical chemistry > [adverb] > by process of specific types of chemical analysis > by means of spectral analysis > specifically by spectrophotometry
spectrophotometrically1897
1897 T. C. Allbutt et al. Syst. Med. IV. 285 Normal fresh urines..examined spectro-photometrically.
1972 R. A. Jackson Mechanism iv. 76 If the reaction is followed spectrophotometrically the presence or absence of stable intermediates is often indicated from the changes in the spectrum as the reaction proceeds.
spectrophoˈtometry n. the technique of using a spectrophotometer.
ΘΚΠ
the world > matter > chemistry > chemical assay or analytical chemistry > [noun] > acetimetry > spectrophotometry
spectrophotometry1899
the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > [noun]
spectrology1862
spectroscopy1870
spectrophotometry1899
spectrometry1902
the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > degree of intensity > measurement of
photometry1807
light curve1857
flicker photometry1897
spectrophotometry1899
photometering1917
1899 London, Edinb. & Dublin Philos. Mag. 5th Ser. 48 421 In direct comparisons of white light this latter principle has been successfully applied; but in spectrophotometry the optical difficulties in the way of its use have prevented the obtaining of corresponding results.
1961 Times 9 Jan. 2/3 (advt.) The Physical Assay Division..is concerned..with..application of industrial methods of analysis including ultraviolet and infra-red spectrophotometry.
1976 G. Thurston Coronership i. 13 Methods of analysis by chromatography and spectrophotometry enable accurate results to be produced with speed.
This entry has not yet been fully updated (first published 1986; most recently modified version published online September 2018).
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