BRIEFS A Burner for Cyanogen Flame Spectroscopy A b u r n e r for a cyanogen and oxygen flame permits use of this flame for qualitative and quantitative spectrochemical analysis. T h e b u r n e r is simple, sturdy, and easy to operate and allows the introduction of microliter quanti ties of liquid under controlled conditions. KEIICHIRO F U W A , R. E. THIERS, and B. L. VALLEE, Harvard Medical School and Peter Bent Brigham Hospital, Boston 15, Mass. Anal. Chem. 3 1 , 1 4 1 9 ( 1 9 5 9 )
Viscosity of Fluids at High Pressures. Rotating Cylinder Viscometer and the Viscosity of n-Pentane
2 2 types of SAFETY ENCLOSURES for handling hazardous substances VACUUM DRY BOX for work in con trolled atmosphere • sloping front · round autoclavetype air lock.
A viscometer is described which is able to measure the viscosity of liquids at pressures up to 2 5,000 p.s.i.a. in temperature intervals between 0° and 500° C. Experi mental data are obtained for κ-pentane and compared to similar data obtained by several other investigators. H. H. REAMER, G . COKELET, and Β. Η. SAGE, California Institute of Technology, Pasadena, Calif. Anal. Chem. 3 1 , 1 4 2 2 ( 1 9 5 9 )
Radiochemical Separations of Cadmium Radiochemical separations of cadmium by four different m e t h o d s are developed, a l l o w i n g a maximum separation time of 30 minutes p e r m e t h o d . T h e s e m e t h o d s were also critically evaluated for yield and contamination using 18 typical tracers.
Safety is the first consideration in this newly-designed stainless steel laboratory equipment. These enclosures make it safer—and easier—for the technician to work with contaminants, micro-organisms, live viruses, in fected animals, poisonous and radioactive substances. Stainless steel constructed with crevice-free surfaces, generously rounded corners, for easy cleaning and de contamination. Write for illustrated folder describing 22 different kinds of enclosures. S. BLICKMAN, INC., 9 6 0 8 G R E G O R Y A V E N U E , W E E H A W K E N , N . J.
J. R. DeVOE and W . W . MEINKE, University of Michigan, Ann Arbor, Mich. Anal. Chem. 3 1 , 1 4 2 8 ( 1 9 5 9 )
UNITIZED ENCLOSURES Low in cost · Stainless steel • Modular construction adapts to many uses.
Melting Point Apparatus for Simultaneous Observation of Samples in Transmitted a n d Reflected Light A melting point apparatus suitable for use with explosive materials is constructed. It consists of a c o p p e r block and an optical system capable of projecting the trans mitted and reflected images of the sample o n a screen. H. E. U N G N A D E , E. A. IGEL, and Β. Β. BRIXNER, Los Alamos Scientific Laboratory, Los Alamos, Ν. Μ. Anal. Chem. 3 1 , 1 4 3 2 ( 1 9 5 9 )
CALIFORNIA-TYPE FUME HOOD Carminic Acid Procedure for Determination of Boron T h é use of carminic acid as a reagent for determining b o r o n is evaluated. Factors affecting sensitivity and precision are studied. An accurate p r o c e d u r e is outlined for b o r o n in the concentration r a n g e between 0 and 40 γ.
For handling radioac tive materials · dualsided for double oper ation.
D. L. CALUCOAT and J. D. W O L S Z O N , Marshall College, Huntington, W. Va. Anal. Chem. 3 1 , 1 4 3 4 ( 1 9 5 9 )
MICRO-BIOLOGICAL SAFETY CABINET Separation of Microgram Quantities of Boron by Mixed Resin Bed Ion Exchange M i c r o g r a m quantities of b o r o n are separated from solu tions by using Nalcite H C R and Amberlite 1R-45 as a mixed resin bed. Accuracy is dependent o n corrections for resin blanks and the total salt content of the sample. D. L. CALUCOAT and J. D. W O L S Z O N , Marshall College, Huntington W. Va. J. R. HAYES, Pennsylvania State University, University Park, Pa.
Back or top mount ing of biological fil ter canister · air lock if wanted.
BLICKMAN SAFETY ENCLOSURES Look for this symbol of quality Blickman
Anal. Chem. 3 1 , 1 4 3 7 ( 1 9 5 9 ) Circle No. 27 on Readers' Service Care VOL. 3 1 , N O . 8, AUGUST
1959
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