... Title : SPECTROPHOTOMETRIC INVESTIGATION OF REACTION OF ... of the absorption spectrum. ... are convenient for determination of niobium in ...
DTIC Science & Technology
... Title : SPECTROPHOTOMETRIC DETERMINATION OF NITRITE ESTERS AND SALTS IN ... The absorption of visible light at 400 millimicrons by the ...
... Given is also an evaluation of possibilities of the spectrophotometric method in determination of metals by the magnitude of light absorption of their ...
The spectrophotometric technique is currently the only technique used to characterize the gas complexation reactions between lanthanide and actinide halides and group III halides. In several cases a temperature-dependent molar absorptivity has been observed. To explain this observation, a temperature-dependent line width and ground ...
Energy Citations Database
... VAPOR PRESSURE OF ATOMIC SPECIES FROM SPECTROPHOTOMETRIC MEASUREMENTS OF THE ABSORPTION OF RESONANCE LINES. ...
... Abstract : Evaluation of a spectrophotometric procedure for ... The specific absorption wavelength of the ... a means of quantitative determination of the ...
... Abstract : An absorption maximum was observed at ... samples by a spectrophotometric method, which ... in the quantitative determination of ...
... study was made of spectrophotometric methods for determination of tantalum and ... Absorption spectra studies were made of compounds of ...
... cj~ I-- SPECTROPHOTOMETRIC DETERMINATION Cr� ... and r-naphthylamine akve been determined from their aiiUav'e�st uV absorption spectra in ...
Absorption spectra obtained from SmBr/sub 3/, SmBr/sub 2/, and Sm0Br were used in identifying the samarium species in several mixed-valence Sm(II/III) compounds produced by H/sub 2/ reduction of SmBr/sub 3/. The nature of the absorption of Sm0Br made it possible to detect even traces of Sm0Br in the Sm bromides.
Annual progress report for the period July 1972 through June Difficulty in the atomic absorption spectrophotometric determination of mercury in the test materials for the /sup 252/Cf evaluation program was traced to the presence of mercury(I) in the solutions for analysis. (auth)
The determination of wear metals in certain used automobile engine oil and aircraft engine oil by the atomic absorption spectrophotometric method is described. Preparation of synthetic metal naphthanates for calibration is described.The procedures develop...
National Technical Information Service (NTIS)
... of mercaptans were measured by one or two of three methods: pH titration, spectrophotometric determination using the UV absorption of the ...
... obtained by the spectrophotometric method agree ... for the determination of binding ... EQUILIBRIUM(PHYSIOLOGY), ABSORPTION, SERUM ALBUMIN ...
... Title : Photometric Determination of Carbon Dispersion ... versus a simple spectrophotometric method. ... the relaitonship of absorption coefficient to ...
... In particular, you have provided analytical data including gas chromatographic, atomic absorption spectroscopic, and spectrophotometric data demonstrating that ...
Center for Food Safety and Applied Nutrition (CFSAN)
... the accuracy in the determination of the ... coefficient, k, around the absorption edge, it ... results obtained from the spectrophotometric and ellipsometric ...
... scattering errors in the spectrophotometric measure- ment ... reflectivity 0.99, and absorption coefficient a ... Sensitivity Analysis The determination of the ...
Sep 19, 2005 ... In terms of ocean color algorithm development, its lack of coincident ... properties (IOPs), such as spectral absorption and backscattering ...
NASA Website
Spectrophotometric studies were made of plutonyl nitrate complex formation in acetone. The compositions of the complexes and their evolution were determined. The absorption spectra of a complex trinitratoplutonyl compound had complex characteristics and differed considerably from perchlorate and plutonyl nitrate spectra. (R.V.J.)
A spectrophotometric probe for in situ absorption spectra measurements comprising a first optical fiber carrying light from a remote light source, a second optical fiber carrying light to a remote spectrophotometer, the proximal ends of the first and seco...
... AIAA-2003-3259 Acoustic Absorption Measurements for ... AIAA 2003 - 3259 Acoustic Absorption Measurements for Characterization of Gas Mixing ...
The interaction between p-phenylenediamine (PPD) as a donor with the pi acceptor 3,5-dinitrobenzoic acid (DNB) has been investigated spectrophotometrically in methanol at room temperature. CT complex formed as a result of transfer of lone pair of electrons and exhibits well resolved charge transfer bands in the regions where neither donor nor acceptor have any ...
PubMed
A spectrophotometric method is suggested for the determination of Sm by its absorption band at 1090 m mu and Eu by its absorption band at 394 m mu with the use of the infrared band of Sm absorption. The method may be successfully used for determining Eu and Sa in their concentrates of any composition, as ...
A mixture of tartaric acid-potassium chloride and strontium chloride has been used for accurate and precise estimation of manganese in various international reference rocks, nodules, soil and related samples by flame atomic absorption spectrophotometry (FAAS). The method is fairly rapid and involves no separation of the analyte from the matrix elements. Sample decomposition is ...
... Abstract : A set of assays have been developed in ... and is followed by a quantitative neutral red spectrophotometric absorption assay (NR-90). ...
... 49, GLC with pulsed flame photometric detector-phosphorus. 50, Flame Atomic Absorption (AA). 59, Liquid Chromatography. 60, Spectrophotometric. ...
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... maintenance of performance in air- dase also has a weak absorption band in the near infrared ... manuscnipt was iccepted flr publication ir June 1987 ...
RELEASED - Printed documents may be obsolete; validate prior to use. ... Additional spectrophotometric methods have been proposed that include ...
The optical properties of acrylamide-based photopolymer doped with pure silica MFI-type zeolites are studied by refractometric and spectrophotometric means. Dynamic light scattering and transmission electron microscopy are used for zeolite characterization, and laser refractometry and white light interferometric profilometry are used for surface ...
NASA Astrophysics Data System (ADS)
A polymethylmethacrylate-based plastic material doped with squalene according to our laboratory protocol, has been tested by spectrophotometric measurements as a dosimeter of ?-radiation. The spectrophotometric characterization shows responses changing in time of which the modelization allows us to find the duration separating the ...
Solvent extraction spectrophotometric and atomic absorption spectrophotometric methods for the determination of selenium(IV) in microgram quantities are described. The selenium(IV) forms yellow colored complex with N-phenylbenzohydroxamic acid (PBHA) extractable into chloroform from 7 M HClO/sub 4/. Se-PBHA complex has maximum ...
Reviews developments in ultraviolet and light absorption spectrometry from December 1981 through November 1983, focusing on the chemistry involved in developing suitable reagents, absorbing systems, and methods of determination, and on physical aspects of the procedures. Includes lists of spectrophotometric methods for metals, non-metals, and organic ...
ERIC Educational Resources Information Center
The spectral absorption by single ommin containing pigment granules or clusters of granules from compound eyes was measured spectrophotometrically between 300 and 700 nm. The measurements were made on fresh and fixed slices from compound eyes of Celerio e...
A procedure for the Flameless Atomic Absorption Spectroscopic analysis of chemical agent Lewisite is given. The analysis is performed on specimens that have been hydrolyzed by solutions, and measures the amount of arsenic present. The method is simple and...
A hydride generator was used with the described atomic absorption spectrophotometric method to determine the arsenic and selenium in sewer effluent. For analysis, the optimum concentration of hydrochloric acid was found to be 0.9N for arsenic and 3N for s...
...million as determined by analytical method entitled �Atomic Absorption Spectrometric Determination of Sub-part-per-Million Quantities...as determined by an analytical method entitled �Atomic Absorption Spectrophotometric Determination of...
Code of Federal Regulations, 2011
A new spectrophotometric method for the determination of micro nickel p-acetyl arsenazo was studied. The maximum absorption of the Ni-p-acetyl-arsenazo complex was observed at 640 nm with the molar absorptivity of 6.03 x 10(4) L.ml-1.cm-1. The nickel content within 0-0.8 mg/L followed the Beer's Law. PMID:12725094
A simple, rapid and reliable method for the determination of lead in hair and teeth samples has been described. The method incorporates digestion of the samples by nitric acid followed by atomic absorption spectrophotometric determination of lead using 283.3 nm wavelength. PMID:6746188
>A spectrophotometric determination of beryllium using beryllon II was studied. It was recognized that beryllium formed a blue water-soluble chelate compound with beryllon II under a basic condition and had a maximum absorption at 620 m mu . Absorbance followed Beer's law at the range of 0.02 to 0.5 ppm of beryllium and the molecular ...
Page 1. Characterization of the Absorption Wave Produced ... Characterization of the Absorption Wave Produced by CO2 Laser Ablation of a Solid ...
Photoacoustic spectroscopy is a recently developed nondestructive analytical technique that provides ultraviolet, visible, and infrared absorption spectra from intensely light scattering, solid, and/or optically opaque materials not suitable for conventional spectrophotometric analysis. In wood and other lignocellulosics, the principal ultraviolet ...
PubMed Central
Molecular inclusion of guest molecules within CDs is known to alter guest molecule spectrophotometric absorptivity, making their determination, based on spectrophotometric data, inaccurate. Therefore specific analytical methods capable of quantifying the drugs as free molecules must be developed and validated. SPE was selected to ...
Methimazole (1-methyl-2-mercaptoimidazole) inhibits both the mono- and the o-dihydroxyphenolase activities of mushroom tyrosinase when assayed spectrophotometrically. With DL-3,4-dihydroxyphenylalanine as substrate, the inhibition was found to be a mixed-type one with Ki 4.6 X 10(-6) M. We found that methimazole can interact with the oxidation products of o-dihydroxyphenols, ...
A continuous spectrophotometric method for the rapid determination of monophenolase activity of tyrosinase is described. This method is based on the coupling reaction between 3-methyl-2-benzothiazolinone hydrazone (MBTH) and the quinone products of the oxidation of various monophenols in the presence of tyrosinase. The chemical reaction between MBTH and o-quinone has been ...
UV spectrophotometric studies of a group of F-G stars with the aid of the Orion-2 space observatory are reported. Obscuration associated with absorption lines of neutral and ionized metals results in a marked stable depression in the UV centering at 2550 and 2800 A. A parameter characterizing the depth of the depression in the ...
... Accession Number : ADA198860. Title : Two-Photon Absorption Characterization. Descriptive Note : Interim performance rept. ...
