the EDITOR'S column
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
·
79
A
