V O L U M E 2 4, NO. 11, N O V E M B E R
27 A
1952
A
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Nephelometry..thenewestanalytical tool
Exact m e a s u r e m e n t of suspended particles w i t h o u t filtering, washing, drying or weighing Nephelometry is a short way to . . . Directly
measure and evaluate
the clarity of liquids
One of the earliest industrial applications of Coleman Photo-Nephelometers was made by distillers of whiskies. Evaluation of filters and filter media and control of haze in the finished whiskey is now a standard procedure throughout this industry. Producers of beer and wines soon followed suit. Measurement and control of the clarity and sterility of parenterals is an impor tant one and includes such items as: Penicillin, Streptomycin, Dihydrostreptomycin Neomycin Sulfate, Vitamin Solutions.
Perform rapid quantitative analysis by measuring precipitates in their original environment Purity of industrial waters and other liquids is easily evaluated with the Nephelometer, especially at very low concentrations. For example: Electric generating plbnts now use Coleman Nephelometers for the evaluation and control of feed waters for high pressure boilers. Control is accomplished by Nephelometric measure ment of calcium (Range 0.0 — 0.5 PPM) in the feed water.
Measure suspensions which cannot be separated for analysis
conveniently
In bacteriology the study of the effects of nutrients and inhibitors on growth rates of bacteria has been given new impetus and significance by the simplicity and precision of the Nephelometric method. These studies include a wide variety of bacterial types, including: Leptospira, Actinomyces Bovis, Tubercle Bacilli, Esch. Coli, Staphylococci. The Nephelometer is useful in determination of butter fat content in dairy prod ucts, and has similarly been helpful in assay of cholesterol in blood chemistry.
COLEMAN NEPHELOMETERS COLEMAN MODEL 7 NEPHELOMETER
COLEMAN MODEL 9 NEPHO-COLORIMETER
for nephelometry only —ask for Bulletin Β-213
for colorimetry and nephelometry— ask for Bulletin B-215
w r i t e Dept. A, Coleman Instruments Inc., M a y w o o d , III.
