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Performance check of the Perkin-Elmer Model 450 SpectrophotometerRasmusson, Raymond William, 1940- January 1971 (has links)
No description available.
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Physico-chemical methods for vitamin D assay and a new spectrophotometerWhittemore, Thomas Edwin January 1950 (has links)
The design and construction of a photoelectric spectrophotometer is described. The completed instrument has a wavelength reset accuracy of 1 A or less over the visible spectrum, and measures transmissions to 1 part in 500 with a bandwidth of 20-30 A. Suggestions for improved accuracy of transmission reading are included. The use of a controlled source makes an accuracy of 1 part in 10,000 theoretically attainable.
This instrument was constructed so that vitamin D assay of low-potency oils could be attempted. Investigation of the antimony trichloride reaction by several authors showed that it was not suitable for this purpose. A preliminary investigation
of the glycerol dichlorhydrin reaction was carried out with a Beckman model D spectrophotometer on several typical oils. It showed that this reaction was no more suitable than the other.
Because of the instability of these reactions no method was found whereby increased instrument accuracy gave a corresponding increase in accuracy of assay. The only feasible
method of assay for low-potency oils at present involves concentration of the vitamin D by chromatography. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
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The spectrophotometric determination of the dissociation constant of a cadmium-nitrate complexVassian, Edwin George 08 1900 (has links)
No description available.
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Calibration and data reduction of an UV spectrophotopolarimeterHodgdon, Ellis Bayley 12 1900 (has links)
No description available.
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An investigation of new methods to improve the accuracy of some modern color spectrophotometers /Petersen, Kelvin H. January 1989 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 1989. / Includes bibliographical references (leaves 104-107).
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Studies in applied spectrophotometryKnudson, Harold William, January 1939 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1939. / Typescript. Includes abstract and vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 104-107).
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A spectrophotometric study of iron-cyanide systems.|nI.|pDetermination of the formation constant of Fe [Fe(CN)₆]⁻.|nII.|pReplacement of acetylacetonate ions from Bis (Acetylacetonato) iron (II) by cyanide ionWu, Yulin 01 August 1965 (has links)
Equilibrium constant (K) values for the formation of Turnbull's blue and Prussian blue have been determined spectrophotometrically at 25 ± 1°. A procedure was used which involved optical measurements in the presence of a large excess of one of the reagents so that the formation of the complex may be considered to be complete. The values of log K = 5.62 ± .03 and log K = 13.89 ± .03 for the formation of Turnbull's blue and Prussian blue, respectively, have been calculated. The ΔH° values for the reactions, Fe^3+ + Fe(CN)_6^4- = Fe^2+ + Fe(CN)_6^3- and Fe^2+ + Fe(CN)_6^3- = Fe[Fe(CN)_6^-], are used in appropriate combination with K values from the present study to calculate the thermodynamic values (ΔS° = 65.4 e.u., ΔH° = 0.55 kcal/mole, ΔG° = -18.95 kcal/mole, log K = 13.89) for Prussian blue formation (Fe^+3 + Fe(CN)_6^4- = Fe[Fe(CN)_6^-]), and to calculate the thermodynamic values ( ΔS° = -24.8 e.u., ΔG° = -7.68 kcal/mole, log K = 5.62) for Turnbull's blue formation. The replacement of the acetylacetonate ions of the bis(acetyl-acetonato)iron(II) species by cyanide ions has been studied by spectro-photometric titration, stoichiometric titration, and elemental analysis.
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An investigation into IKBS techniques for analytical spectrofluorimetryMilne, Kenneth Thallon January 1986 (has links)
No description available.
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Fixed soil potassium nature of the fixation and liberation processes [I.] ; II. Improved extracting solutions for determining available soil potassium with quick tests ; III. Revised procedure for determination of exchangeable potassium, sodium, magnesium, and calcium in soils with the Beckman model DU flame spectrophotometer /Dubrovin, Kenneth Paul, January 1956 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1956. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 148-159).
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Instrumental studies in flame spectrophotometryBoycks, Edward Charles, January 1955 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1955. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographies: leaves 159-162, 185, 249-250.
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