New Areas of Research Open for the Analytical Chemist
SEE THESE I N S T R U M E N T S at t h e Pittsburgh S h o w !
CHROMATOGRAPHIC ANALYSIS
THERMOGRAVIMETRIC ANALYSIS
Aminco's sew Gas Chromatograph analyzes both gases and liquids by means ef a variety of detecting units: (1) thermistor, (2) hot wire filament, and (3) RF discharge. Unit operates at extremely high temperatures; uses small volumes of sample; is highly sensitive.
New analytical tool that subjects samples to temperatures up to 1000°C. in vacuum or gases, and permanently records changes in weight as a function of: (1) temperature, programmed for selected linear heating rate, and (2) time, at a constant temperature. Operation is completely automatic.
{Send for Bulletin 2320-H)
(Send for Bulletin 2328-H)
All these instruments will be displayed at the Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, Feb. 27-March 3, at the Penn-Sheraton Hotel, P i t t s b u r g h , Pa., Booth 90-91.
SPECTROPHOSPHORIMETER
Papers discussing applications
MENISCO-MATIC BURET
for two of these instruments
Accomplishes macro, micro, and ultra-micro titrations; dispenses titrants mechanically. Exact volumes of titrant dispensed are indicated on a counting device that reads to closest 0.0001 ml. A new recorder attachment permits permanent record of titrant volumes dispensed.
ACCEPTED for SHOW PRESENTATION Papers describing important new applications of the Aminco Titracoiormat (Paper 14) and the Spectrophosphorimeter (Paper 120) have been accepted for presentation at the Pittsburgh Conference. Reserve a few minutes of your schedule for: Paper No. 14—"Automatic Determination of Calcium with Calcein", by J. Wasilewski, to be presented at 10:50 A.M., Monday, February 27, in the Pittsburgh Room of the Penn-Sheraton Hotel (15 minutes); and Paper No. 120—"Electronic Emission Spectra of Some Tryptophan Metabolites", by H. Howerton, to be presented at 2:00 P.M. on Wednesday, March 1, in the Terrace Room of the Penn-Sheraton Hotel (10 minutes).
AMERICAN INSTRUMENTCO.,INC.
AMINCO 8030 Georgia Ave., Silver Spring, Md.
(Send for Bulletin 2286-H)
(Send for Bulletin 2334-H)
TITRAC0L0RMAT AUTOMATES C0L0RIMETRIC TITRATIONS Operating t o g e t h e r with the Menisco-matic Buret shown above, this new instrument automatically stops colorimetric titrations at the end point, and provides digital readout of the titrant volume delivered. Data may be fed to chart recorders, printers, or computers. Note paragraph at left; Paper No. 14 to be delivered at the Pittsburgh Show.
Circle No. 109 on Readers' Service Card 14 A
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ANALYTICAL CHEMISTRY
The Aminco-Keirs Spectrophosphorimeter identifies innumerable compounds through their phosphorescence characteristics. Data are traced on an oscillograph or plotted on a recorder. Instrument provides three types of phosphorescence data: activation spectra, emission spectra, or time decay curves. Range is 200-800 millimicrons. Note paragraph at bottom left; Paper No. 120 to be delivered at the Pittsburgh Show.
CHLORIDE TITRATOR Measures chloride content of biological samples such as serum, plasma, etc. Titrations can be completed in from 5 to 60 seconds with standard deviation of 0.5% of mean value. Completely automatic, the unit measures as little as 0.25 micro equivalents of chloride. Samples as small as 0.01 ml. of serum can be processed. (Send for Bulletin 2337-H.)
