Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1983-01-25
1984-10-23
Goldberg, Gerald
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73432PS, G01N 1504
Patent
active
044780737
ABSTRACT:
There is provided a new method for analysis of the size and/or distribution of particles emanating from a mother liquid by sedimentation in a rotating disc centrifuge, particularly a photosedimentometer. The method is characterized in that the spin fluid or medium is formed externally of the disc as distinct from being formed within the disc while it is rotating. The externally prepared spin medium is formed from at least two miscible liquids of different densities for example, methanol and water, in a manner such that they are substantially incompletely mixed whereby a density gradient is established in the spin medium. Thereafter the spin medium is injected into the disc while spinning at a given speed, and later the mother liquid is injected. Results are closely comparable to the buffered line start method described in U.S. Pat. No. 3,475,968.
REFERENCES:
patent: 2956434 (1960-10-01), Donoghue
patent: 3237455 (1966-03-01), Slater
patent: 3243106 (1966-03-01), Atherton et al.
patent: 3475968 (1969-11-01), Jones
patent: 4055076 (1977-10-01), Tropea
patent: 4311039 (1982-01-01), Koehler et al.
Anal. Chim. Acta 38, (1967), pp. 143-146, Jones et al., Particle Size Analysis of Inorganic Pigments.
Proc. Soc. Analyt. Chem., Apr. 5, 1966, pp. 116-117, Jul. 1966, "The ICI-Joyce-Loebl Disc Centrifuge", Jones.
Powder Technology, 13, (1976), pp. 215-221, "Particle Size Determination of Pigments with a Disc Centrifuge", Brugger.
Pigments Handbook, III-A-d-2-ii, pp. 53-62, "Centrifugal Sedimentation", Fraser.
Powder Technology 1, (1967), pp. 103-115; "The Accuracy and Precision of the Centrifugal-Disc Photosedimentometer Method of Particle Size Analysis", Burt.
Jour. Oil & Colour Chem. Assoc., vol. 50, (1967), pp. 594-614; "Size Analysis of Organic Pigments using the ICI-Joyce-Loebl Disc Centrifuge", Beresford.
Jour. Soc. Dyers & Colourists, 80, (1964), pp. 521-526, "The Measurement of Particle Size and its Practical Significance in Vat-Dye Quality", Atherton et al.
Colloid and Polymer Sci. 257, (1979), pp. 522-532; "Sedimentation Analysis of Aqueous Polymer Dispersions with a Disc Centrifuge", Langer.
Particle Size Analysis Conference, (1966), pp. 242-257; "The Two-Layer Method of Centrifugal Particle Size Analysis", Scarlett et al.
Chemical Analysis, "Direct Characterization of Fine Particles", Kaye, vol. 61, John Wiley & Son (1981), pp. 189-226.
Colloid & Polymer Science, 258, pp. 1077-1985 (1980), CODEN CPMSS, "Schnelle Dichtegradienten-Zentrifugation Dispergierter Teilchen, Lange.
Alex. Dissertation for PhD in Engineering, Jul. 15, 1972, Univ. of Karbruhe, "Zur Genaulgkeit der Teilchengrossenanalyse durch Sedimentation im Zentrifugalfeld".
Holsworth Richard M.
Provder Theodore
Douthitt M. H.
Goldberg Gerald
Roskos Joseph W.
SCM Corporation
Sturges R. A.
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