BRIEFS for easier, surer access
Evaluation of Gas Chromatographic Columns for the Separation of Fluorinated Materials
to recorded information
A substrate, monophase gel, prepared by plasticizing halogenated polymers with halogenated oils proved superior t o conventional two phase columns for t h e separation of fluorinated materials. A gas chromatograph was designed and built for this study.
in CHEMICAL ABSTRACTS Place your order for one or
IHOR LYSYJ and P. R. NEWTON, Rocketdyne, Canoga Park, Calif.
more of the CA indexes
Anal. Chem. 35, 90 (1963)
27-YEAR COLLECTIVE FORMULA INDEX TO CHEMICAL ABSTRACTS (1920-46) Over half a million organic and inorganic compounds listed and thoroughly cross referenced for a significant period of growth.
In two volumes of about
1000
Activated Cellulose for Solution-Adsorption Chromatography Cellulose is activated by grinding with polar solvents and carefully removing these liquids. This results in increased adsorption capacity for carotene and related pigments. By careful control of conditions, reproducible sorptive preparations are found. C. K. MILLER, DANIEL STEFFENSON, H. D. FRAME, Jr., and H. H . STRAIN, Argonne National Laboratory, Argonne, I I I . Anal. Chem. 35, 93 (1963)
pages each. Paper bound · $100.00
Cloth bound · $120.00
10-YEAR NUMERICAL PATENT INDEX TO CHEMICAL ABSTRACTS (1937-46)
Determination of the True Chloride Content of Biological Fluids and Tissues. I. Analysis by Chlorine-36 Isotope Dilution
Over 143,000 entries classified by countries in numeri-
Complete isotopic exchange of stable with added radioactive chloride in a solution formed by hot alkaline digestion is followed b y t h e determination of diluted specific activity in purified solutions obtained b y successive stages of alkaline dry ashing, oxidation-reduction, and distillation. This method provides a standard for evaluating other simpler methods of chloride analysis in biological materials.
cal order with volume and page references to CHEMI-
ERNEST COTLOVE, National Institutes of Health, Bethesda, M d .
CAL ABSTRACTS for an important decade.
Contains
Anal. Chem. 35, 95 (1963)
182 pages. Cloth bound · $10.00
DECENNIAL INDEXES TO CHEMICAL ABSTRACTS Complete subject and author indexes to CHEMICAL ABSTRACTS for the 10-year periods of 1917-1926, 1927-1936, and 1937-1946. 2nd Decennial Index (1917-1926)
Paper bound · $125.00
3rd Decennial Index (1927-1936)
Paper bound · $175.00
4th Decennial Index (1937-1946)
Paper bound · $200.00
(Extra charge for foreign
postage)
Order from : Special Issues Sales American Chemical Society 1155 Sixteenth Street, N. W. Washington 6, D. C.
Determination of the True Chloride Content of Biological Fluids and Tissues. I I . Analysis by Simple, Nonisotopic Methods For biological fluids, direct dilution and automatic, coulometric-amperometric titration is suitable. For tissues, a solution for titration can be prepared by alkaline digestion of wet or dried tissue, followed by zinc hydroxide yirecipitation of protein, and perborate oxidation of sulfhydryl groups in the supernatant ; dilute nitric acid extraction of fat-free, dried, pulverized tissue ; or water extraction. Isotopic dilution procedure was used as a standard of reference for comparing these methods. ERNEST COTLOVE, National Institutes of Health, Bethesda, M d . Anal. Chem. 35, 101 (1963)
High Temperature Diffuse Reflectance Spectroscopy A sample holder is described which is used for high temperature diffuse reflectance spectroscopv from ambient to 500° C , in the 350- to 750-m/i wavelength region. T h e technique offers possibilities in other analytical and inorganic applications. W . W . WENDLANDT, P. H. FRANKE, Jr., and J . P. SMITH, Texas Technological College, Lubbock, Tex. Anal. Chem. 35, 105 (1963) VOL. 35, NO. 1, JANUARY 1963
·
15 A
