13 A
V O L U M E 2 4, NO. 3, M A R C H 1 9 5 2
DETECT all METALLIC ELEMENTS
——*• at a Glance t Using IMPROVED Spectranal Methods (U. S. Patent Pending)
TWO SPECTRANAL METHODS OF ANALYSES Complete qualitative analysis of all metallic elements can be made rapidly b y simple visual spectroscopic methods. B y using a basically new method of element excitation, analyses m a y now be made directly on either metallic samples or elements in solution b y the methods shown below. To Spectranal power supply
power supply
Sample of metal to be analyzed
Excitation
electrode
Platinum electrode 10% Nitric Acid solution o n l y For analysis of m e t a l strips, wires, rods, turnings, etc.
Sample dissolved ir 10?ό Nitric Acid For analysis of metallic e l e m e n t s in solution.
In t h e method on t h e left, the excitation light appears on t h e submerged surface of t h e metal sample being analyzed. This light when viewed through the spectroscope is seen t o be composed of only t h e principle spectral identification linos of each element present in t h e sample. In t h e other method, only t h e dissolved metallic elements pro duce their identification lines. T h e special excitation electrode docs not produce any lines of its own. A specially prepared reference table, which gives the wave lengths of 4 identification lines of each metallic element, is supplied with t h e instrument. One or more elements in a sample m a y be readily detected simply by noting whether their 4 reference table identification lines are present among the spectral lines of the sample.
ANALYZES ALL TYPES OF SAMPLES Metallic elements in any t y p e of sample material, regardless of its composition or physical state, m a y be readily analyzed. Samples m a y be alloys, biological materials, pharmaceuticals, ores, minerals, foods, inorganic a n d metallo-orgamc chemicals, soils, water, drugs, etc., either as solutions or solids. Simple procedures are given in t h e operating instructions for preparing a n y t y p e of sample material for analysis.
WIDE ACCEPTANCE Several hundred industrial, institutional, a n d governmental research a n d control laboratories are using t h e original Spectranal method for routine analyses. Write NOW for B u l l e t i n 140.
FEATURES • • • • • • • • •
Rapid detection Positive i d e n t i f i c a t i o n Good sensitivity Visual m e t h o d Micro or s e m i - m i c r o s a m p l e s Sample n o t destroyed Continuous excitation Harmless excitation voltage N o accessories required
T O D D SPECTRANAL as shown includes the built-in high quality Bausch & Lomb im proved prism spectroscope with reference scale, achromatic lenses, and all adjustments. The base contains the excitation power supply and controls. Also included are the glass excitation chamber with the special excitation electrode and a platinum electrode, support rod, clamp, variable scale light and beaker for water cooling. For use on 110 volts a. c. or d. c. Overall height 21*. Complete with operating in structions $350
IMMEDIATE SHIPMENT
TODD SCIENTIFIC COMPANY [Distributors and manufacturers of special scientific laboratory apparatus.
S P R I N G F I E L D , PA.
