PHOENIX PRECISION INSTRUMENT COMPANY

Stream Splitting System 5500. Sensitivity: 0.1 to. 3.0 micromoles of amino acid with a precision of 100 zb. 3%. Useful results at even lower levels. P...
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VACUUM DISTILLATION PUMP SINGLE-STAGE

CONSTRUCTION

Extra Large Oil Reservoir dilutes vapors, reduces sticking and corrosion of mechanism.

L.T. H a l l e t t , E d i t o r

TΗΕ

Guaranteed Vacuum 20 microns (0.02 mm Hg) Greater Free Air Capacity 33.4 liters / minute

STATUS OF ANALYTICAL C H E M ­

ISTRY in foreign

Pump Revolutions—300 RPM Motor—1/3 HP—1725 RPM Tubing Required—5/8-inch i.d. Over-all Dimensions of Mounted Pump 195ixll^sxl5M inches high Belt-tightening Provision Extra Supply of Duo-Seal Oil

nations is al­

ways of interest to us. W e were pleased therefore, t o receive t h e J a n u a r y - M a r c h (1961) issue of French Science News, as it contains a special study entitled "Analytical Chemistry in F r a n c e . " Notwithstanding the success of such special analytical techniques as spectroscopy, analytical chemis­ try in France in t h e 19th century was considered a minor science for which no special training was r e ­ quired. I t was felt t h a t any quali­ fied chemist could use the "recipes" involved and do required analytical work. E a r l y in the 20th century it was discovered not only t h a t basic ana­ lytical chemical research was r e ­ quired to develop analytical methods b u t t h a t this research con­ tributed greatly to progress in the fields of organic, biological, a n d inorganic chemistry. Study of elec­ trochemical phenomena as analyti­ cal tools, for example, led to a better understanding of industrial prob­ lems in electrochemistry.

PRICE

$ P a t e n t No. 2337849 Mo. 1404H 1404H. WEGNKR PUMP, Motor Driien. For 115 volts, 60 Cycles. A.C. Each $150.00 14041. WEGJNER PUMP, Motor Driven. For 230 volts, 60 Cycles, A. C. Each $152.00

Complete with Motor

1404F. WEGNKR PUMP, Motor Driven. For 115 volts, D.C. Each $215.00 For attached Belt Guard add $17.50 to prices. 1404. WEGNER PUMP, U n m o u n t e d . With pulley, but without motor, belt, or base Each $115.00

THE WELCH SCIENTIFIC COMPANY ESTABLISHED 1880



1515 Sedawick Street, Dept. A-1, Chicaso 10, Illinois, U. S. A. Manufacturers of Scientific Instruments and Laboratory Apparatus

New PHOENIX A M I N O ACID ANALYZER MODEL

K-8000

Automatic Analysis of Amino Compounds in • Protein Hydrolysates

Separation procedures, developed for analytical purposes, extended the traditional chemical separation techniques, precipitation and frac­ tional crystallization, into such areas as solvent extraction, liquid or gas chromatography, a n d ion exchange. In 1926, Paul J o b published a book entitled "Physical Methods Applied to Chemistry." This w a s a revelation to many and some feel that the research this book insti­ gated gave analytical chemistry added impetus Work done by Prof. G. Chariot on his own and in collaboration with other scientists, plus his publica­ tions, contributed greatly to the evaluation and renewal of interest

150=

• Protein free plasma and other • Physiological fluids • Tissue extracts • Hydroponic solutions • Foods • Culture media • Pharmaceuticals • Adaptable to Phoenix Stream Splitting System 5500 Sensitivity: 0.1 to 3.0 micromoles of amino acid with a precision of 1 0 0 z t 3%. Useful results a t even lower levels.

P PHOENIX

PRECISION

3803-05

NORTH

INSTRUMENT FIFTH

P

I

COMPANY

ST., PHILADELPHIA

40,

PENNSYLVANIA

Circle No. 123 on Readers' Service Card VOL.

33,

NO.

9,

AUGUST

1961

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79

A