the EDITOR'S column - Analytical Chemistry (ACS Publications)

Chem. , 1961, 33 (9), pp 79A–83A. DOI: 10.1021/ac60177a738. Publication Date: August 1961. ACS Legacy Archive. Cite this:Anal. Chem. 33, 9, 79A-83A...
1 downloads 0 Views 611KB Size
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

EDITOR'S C O L U M N

in analytical chemistry in France. Prof. G. Chariot is on t h e Faculté des Sciences a n d a t t h e Ecole Supérieure de Physique et de Chimie Industrielles in Paris. H i s book, "Chemical Reactions in Solution a n d Quantitative Analysis," published in 1942, h a s become a classic. The report cites t h e contributions of other famous French analytical chemists all of whom helped increase t h e status a n d stature of analytical chemistry in France. Teaching. Continued future growth of analytical chemistry, according t o the report, is dependent to a great extent on the quality of, instruction offered in this field. I n struction of t h e caliber given by scientists like Prof. Chariot contributed greatly to the future of analytical chemistry. Texts t h a t he has prepared or coauthored illustrate t h e scope of t h e teaching. These include " T h e o r y a n d N e w Methods of Qualitative Analysis" (1942), "Qualitative Analysis a n d Reactions in Solutions" (1957 r e vision of the 1942 b o o k ) , "Modern Methods of Quantitative Mineral Analysis" (1945), and "Methods of Analytical C h e m i s t r y " (1960), plus several others. Analytical Research. This r e port discusses work done in the area of pure a n d applied research by several government laboratories in France. Industrial laboratories are not included, although some do pure and applied research.

PINPOINT

END POINTS

PRECISELY

WITH

FISHER TITRIMETER® Precision electronics, The Laboratoire Municipal de NEW wide choice of electrodes permit exceptionally close determination Paris was established in 1878 as a p a r t of t h e Préfecture de Police. of titration endpoints. Range: 0 to ± 1 4 0 0 mv, 0 to 14 pH. ResoAfter World W a r I I it did a lot of lution: ± 2 mv, ± 0 . 0 2 pH. Accuracy: ± 0 . 5 % . New Titrimeter, research in organic analysis u s Fisher's potentiometric titrator (patent pending), comes in two deing microchemical methods. I t s signs: Model 35 for manual titrations; time-saving Model 36 for methods, techniques, a n d instruments were so good t h a t this labautomatic and manual titration. Optional accessory kits for microoratory did such work for laboraand Karl Fischer titrations. Full details from your nearest Fisher tories affiliated with t h e National branch, or write Fisher Scientific Company, 100 Fisher Building, Center for Scientific Research. T h e Pittsburgh 19, Pa., for information Bulletin FS-247. j-ieo demands for service became so great t h a t t h e National Center created its own central microanalysis department. The Faculté

de Pharmacie de

F FISHER SCIENTIFIC

World's Largest Manufacturer-Distributor

of Laboratory Appliances & Reagent Chemicals

Boston · Chicago · Fort Worth · Houston · New York · Odessa, Texas Philadelphia · Pittsburgh · St. Louis · Washington · Montreal · Toronto Circle No. 120 on Readers' Ssrvice Card

EDITOR'S COLUMN Paris has made substantial contributions to analytical chemical research in the field of medicine and food. Prof. Gautier, head of this organization, correlated and coordinated methods used in these types of analysis and developed reagents and methods. The Centre d' Etudes et R e cherches des Charbonnages de France has done considerable work in the analysis of coal and coke, tars and derivatives, petroleum, and silica dust. The Centre National d'Etudes et Recherches Céramique, has concentrated on improving analytical methods for ceramic materials, particularly silicates, through use of both chemical and physieochemical means. The I n s t i t u t de Recherches de la Sidérurgie works in three major areas: rapid methods for steel analysis, for example, emission spectrography ; analyses of the finished products using both spectrographic and classical chemical methods; and metallurgical research. T h e I n s t i t u t des Corps Gras has a wide variety of research programs for the analysis of fats. Included are trace determination of iron using colorimetric methods, inverted phase division chromatography for oxidized fats, column chromatography for glycerides in oils, methods for determining urease in soybean oil, and gas chromatography for the volatile constituents in extracted oils. The Institut Française de Caoutchouc centers its research on determination of mineral contents of vegetable fibers. N a t u r a l rubber is an area of major interest. One project, physiological diagnosis, consists of determining the major and trace mineral needs of hevea (rubber) plants through analyses of thousands of samples. This helps determine mineral fertilizer requirements. Proper fertilization, in turn, has led to more productive rubber trees.

Only $1750! Over $500 less t h a n its closest competitor! B u t don't let its low cost fool you. In colleges all over the country it's a busy teaching tool, with overtime use in faculty research projects. In industry, it's a basic tool of quality control and new product development.

Bausch & Lomb 1.5 METER STIGMATIC GRATING Spectrograph

Bausch & Lomb DUALGRATING Spectrograph H e r e ' s the equivalent of two spectrog r a p h s in one! Now you can photograph two different spectral regions . . . in just one exposure . . . on a single 4" χ 10" plate or two 2" χ 10" plates. Highest dispersion and resolu­ tion, for critical edge-to-edge study. So efficient, it reduces h o u r s of analysis to minutes!

How much spectrograph do you really need ? Depends on your work. T h e more critical, the more you need the high dispersion and resolution of the Dual-Grating. But in more routine use, the simplicity and low cost of the 1.5 Meter make it a popular choice. And there are widely overlapping areas of quality control, education and research in which only your future needs can determine which you should choose. In short, the answer depends on thorough knowledge of your analytical problems and objectives. We'll be glad to survey your requirements—in complete confidence—and recommend the right equipment for your present and future needs. J u s t call us in for con­ sultation at your conven­ ience. No obligation, of BAUSCH & LOMB INCORPORATED course. 8 1 0 2 0 Bausch Street, Rochester 2, Ν. Υ. •

B A U S C H & LOMB SINCE

165J

Please schedule a consultation at my con­ venience with no obligation to me. Π Please send Spectrograph Catalog D-277. NAME,

TITLE

PROFESSIONAL

Made in America, to the world's highest standards.

ADDRESS

Circle No. 9 on Readers' Service Card

VOL. 33, NO. 9, AUGUST 1961 · 8 3 A