spectrophotometer

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spectrophotometer

 [spek″tro-fo-tom´ĕ-ter]
1. an apparatus for measuring light sense by means of a spectrum.
2. an apparatus for determining the quantity of coloring matter in a solution by measurement of transmitted light. See also colorimeter.

spec·tro·pho·tom·e·ter

(spek'trō-fō-tom'ĕ-tĕr),
An instrument for measuring the intensity of light of a definite wavelength transmitted by a substance or a solution, giving a quantitative measure of the amount of material in the solution absorbing the light; a colorimeter with a choice of wavelength and photometric measurement.
[spectro- + photometer]

spectrophotometer

/spec·tro·pho·tom·e·ter/ (spek″tro-fo-tom´ĕ-ter)
1. an apparatus for measuring light sense by means of a spectrum.
2. an apparatus for determining quantity of coloring matter in solution by measurement of transmitted light.

spec·tro·pho·tom·e·ter

(spek'trō-fŏ-tom'ĕ-tĕr)
An instrument for measuring the intensity of light of a definite wavelength transmitted by a substance or solution, giving a quantitative measure of the amount of material in the solution absorbing the light; a colorimeter with a choice of wavelengths and photometric measurements.

spectrophotometer 

An instrument for measuring the relative intensities of the spectrum, wavelength by wavelength. Specifically it measures the spectral transmission factor (i.e. the ratio of radiant flux transmitted through a medium to that incident on it) of a medium for a given wavelength. This factor is usually plotted as a graph against many wavelengths providing a spectral transmission curve. Ophthalmic lenses, contact lenses and any other substances (e.g. tear lipids) through which light may be passed can thus be analysed. See density.

spectrophotometer

an apparatus for determining the ability of a solution to absorb light of a specific wavelength by measuring the transmitted light.
References in periodicals archive ?
Previously, the antioxidative capability had been evaluated mainly spectrophotometrically, but CE allows a simultaneous monitoring of the oxidation of several phenolic compounds over time using a stable free radical like DPPH.
We measured complex II spectrophotometrically at 600 run as described, with some modifications (6).
Catalase (CAT) activity was determined spectrophotometrically according to the method of Higgins et al.
to NADPH was monitored spectrophotometrically (Model FP 6300, JASCO, Essex, UK) at excitation and emission wave length of 366 nm and 455 nm respectively.
2007) based on the principle that there is an SOD- mediated decrease in the rate of auto-oxidation of hematoxylin in aqueous alkaline solution which yields a chromophore with maximum absorbance at 560 nm and hence can be measure spectrophotometrically.
Before use, AFA-MAA concentration (principally porphyra-334) was evaluated spectrophotometrically at 334 nm ([OD.
45 [micro]m) and were analyzed for drug content spectrophotometrically at 233 nm using the UV-visible spectrophotometer (UV-1700, Shimadzu, Japan) [22-24].
The colour intensity, which can be measured spectrophotometrically, was related to the total amount of oxidant molecules present in the sample.
The rate of change of absorbance during the conversion of NADPH to NADP+ was recorded spectrophotometrically at 340 nm for 2.
Rat plasma pyruvate kinase and the production of reactive oxygen by phagocytes were detected spectrophotometrically and by flow cytometry respectively.
All enzymes were assayed spectrophotometrically by tracing the changes in absorbance at 27[degrees]C using UV-VIS SPECORD or SPECOL 11.
Chlorophyll a and chlorophyll b concentrations of each sample from each treatment were determined spectrophotometrically by the method of Inskeep and Bloom (1985).