Quantitative determination of titanium dioxide in cellulose acetate spinning solutions

1990 ◽  
Vol 21 (6) ◽  
pp. 516-517
Author(s):  
G. E. Konovalova ◽  
S. Z. Rosina ◽  
R. A. Muminova ◽  
Yu. T. Tashpulatov
Keyword(s):  
Titanium Dioxide ◽  
Quantitative Determination ◽  
Cellulose Acetate

The side reactions in the esterification of phthalic anhydride with 2-ethylhexane-1-ol in the presence of organotitanates

1984 ◽  
Vol 49 (1) ◽  
pp. 253-266 ◽  
Author(s):  
Jan Novrocík ◽  
Marta Novrocíková ◽  
Jiří Norek ◽  
Ivan Koruna ◽  
Miroslav Ryska
Keyword(s):  
Titanium Dioxide ◽  
Quantitative Determination ◽  
Homogeneous Catalysis ◽  
Phthalic Anhydride ◽  
Spectral Methods ◽  
Side Reactions ◽  
Hydrated Titanium Dioxide ◽  
Ethylhexyl Phthalate ◽  
Hydrated Titanium

Using synthetic, chromatographic and spectral methods, we studied the side reactions accompanying the preparation of di-2-ethylhexyl phthalate from phthalic anhydride and 2-ethyl-hexane-1-ol in the presence of catalytic amounts of tetra-n-butyl titanate.The catalyst proper was titanium(IV) mono-2-ethylhexyl phthalate. The possibility of a simultaneous gas-chromatographic quantitative determination of mono-2-ethylhexyl phthalate, di-2-ethylhexyl phthalate, 2-ethylhexane-1-ol and tetra-n-butyl titanate, reported in the literature, has been refuted. In the esterification catalysed by hydrated titanium dioxide homogeneous catalysis by the formed organotitanate was dominating. The dissolving of hydrated titanium dioxide in the esterification of phthalic anhydride with 2-ethylhexane-1-ol was studied polarographically.

Single Radial Immunodiffusion of Undiluted Serum Proteins

1972 ◽  
Vol 18 (3) ◽  
pp. 237-238 ◽  
Author(s):  
M C B Pizzolato ◽  
M A Pizzolato ◽  
A Agostoni
Keyword(s):  
Quantitative Determination ◽  
Cellulose Acetate ◽  
Serum Proteins ◽  
Radial Immunodiffusion ◽  
Simple Method ◽  
Single Radial Immunodiffusion ◽  
Routine Work ◽  
Undiluted Serum ◽  
Single Strip

Abstract A simple method is described for quantitative determination of IgG, IgA, IgM, α2M, and other proteins without dilution of the sample. Strips of gelatinized cellulose acetate spread with antiserum are used as a supporting medium. The method is accurate, highly reproducible, and seems particularly suitable for routine work because it permits determination of hypo-, normal, and hyperglobulinemia on a single strip.

Collaborative Study of the Quantitative Determination of Titanium Dioxide in Cheese

1973 ◽  
Vol 56 (3) ◽  
pp. 535-537 ◽  
Author(s):  
Joseph L Leone
Keyword(s):  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Sulfuric Acid ◽  
Quantitative Determination ◽  
Collaborative Study ◽  
Color Development ◽  
Orange Color ◽  
Colorimetric Procedure

Abstract A quantitative, colorimetric procedure for the determination of titanium dioxide has been subjected to collaborative study. The method incorporates ashing, dissolution of the ash in sulfuric acid, and color development using hydrogen peroxide. The Spectrophotometric response is compared to a standard prepared similarly. The yellow-to-orange color is quite stable in the absence of Fe. Other interferences are Ni, Cu, Co, Mb, Vd, and Cr. A collaborative study of cheese containing 0.05, 0.10, and 0.4% titanium dioxide gave favorable results. The method has been adopted as official first action.

Quantitative determination of longitudinal and transverse cross-relaxation rates

1999 ◽  
Vol 96 (9/10) ◽  
pp. 1608-1615
Author(s):  
T. E. Malliavin ◽  
H. Desvaux ◽  
M. A. Delsuc
Keyword(s):  
Quantitative Determination ◽  
Cross Relaxation ◽  
Relaxation Rates
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