Precise, Rapid Determinations of Solution Concentrations with the Goldberg T/C* Refractometer used as a fr concentrimeter^ C o u n t l e s s A p p l i c a t i o n s : T h e N e w Model 10402 Goldberg T / C * Refractometer can be used as a "concentrimeter" t o check a n d adjust concentrations of laboratory reagents a n d preparations, pharmacy batches a n d prescriptions. It's ideal for deter-
I
m i n a t i o n of p e r cent composition a n d concentration of p u r e solutions such as salts,
TYGor plastic
TUBING
sugars, acids, or those of relatively fixed component ratios such as sea water or sodium hypochlorite; of refractive index of p u r e liquids a n d liquid mixtures. It's a n ideal teaching a n d research tool for chemistry and physics laboratories dealing with refraction or the need to measure concentrative properties of solutions, concentration, specific gravity, freezing p o i n t depression, molarity, etc. A u t o m a t i c T e m p e r a t u r e C o m p e n s a t i o n : U n i q u e , hermetically-sealed
liquid
prism eliminates error due to temperature changes. I n s t a n t R e a d i n g s : Read index of refraction and index of refraction
difference
direct from built-in double scale. S m a l l S a m p l e N e e d e d : N o m o r e t h a n 0.02 ml . . . a single d r o p of solution, is needed for immediate, inexpensive microanalysis of valuable solutions.
• Flexible
A c c u r a t e : Refractive index scale reads directly to .0002. From this, .0001 may be
• Glass-clear
t o large bench-type A b b e refractometers. These results m a y b e obtained anywhere.
• Chemically inert
T h e new Goldberg Refractometer and its use as a "concentrimeter" were developed
• 73 Standard sizes
of Illinois College of Medicine.
estimated easily. T h i s is equivalent to 0.1 g m . % solute a n d comparable in accuracy N o water bath or temperature controller is needed.
in cooperation w i t h D r . A. V. Wolf, H e a d of the Dept. of Physiology, University
224-H
Plastics S Synthetics Division
U. S. STONEWARE
American
Optical
C O M PAN Y INSTRUMENT DIVISION, BUFFALO 13, N I W YORK
IN CANADA w r i t e - -P.O. Circle No. 188 on Readers' Service Card
·
ANALYTICAL CHEMISTRY
Name Address City
AKRON 9 , OHIO
120 A
Dept. CA8 Gentlemen : Please send complete information on the Goldberg T / C Refractometer.
. Zone .
State .
Box 130, Postal Station R, Toronto 17, Ontario
Circle No. 22 on Readers' Service Card
