Manufacturers' Literature
ESCA. An 18-p brochure describes an approach to building as ESCA com plete with uv source and high-powered 22 kV, 300 mA X-ray source for under $50,000. Advanced Research Instru ment Systems, Inc. 512-926-6130 6 2 3
CORCO •
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REAGENT CHEMICALS
Application Notes Long and short-wave lamps, 10 p, "endless" applications in lab and re search and industry including 80 ref erences. Atomic Products Corp. 6 2 4
ACIDS Sulfuric Acetic
Dry-column chromatography reprint, 10 p, procedure for transferring ana lytical tic separations to preparative scale. Waters Assoc, Inc. 625
Nitric Hydrochloric Perchloric Phosphoric
Condensation nuclei counter, 2 p, in cluding 16 references, on uses of this instrument in research, pollution mea surements, etc. Billings & Gussman, Inc. 626
BASES A m m o n i u m Hydroxide Potassium Hydroxide Sodium Hydroxide
Analog devices, 11 p, basic analog multiplier principles, gives 14 circuits. Analog Devices, Inc. 627
SOLVENTS Analytical Electronic Spectro photometric
Microtome knife sharpening, 20-p monograph from Professor Haselmann of Germany, describes faster sharpen ing process and includes references. Shandon Scientific Co., Inc. 628
ELECTRONIC CHEMICALS
Boiler metal failure analysis, 12 p, explains how metallography is used, includes metallography glossary. Nalco Chemical Co. 629
Dopants Epitaxials A c i d Etches
STANDARD SOLUTIONS
Acrylamide gel electrophoresis rea gents, 2 data sheets, use of acrylam ide and iVjA^-methylenebisacrylamide. Polysciences, Inc. 630
Volumetric Buffer Percentage
Temperature standards, 2 p, describes how to calibrate instruments with or ganic compounds designed for the 50300°C range. Fisher Scientific Co. 631
SPECIALTY REAGENT CHEMICALS Methoxides Sodium Biphenyl E.D.T.A.
Tic separations, bulletins on separation of oil-soluble vitamins, bile acids, digi talis compounds, phenyl phosphines, purines, nitrophenols, antipyretics, and monophosphate nucleotides on com pany tic sheets. J. T. Baker Chemical Co. 632
CUSTOM CHEMICAL SYNTHESIS
Cell counting, 8 p, using the Autocytomcter II and Hem-alyzer for animal blood cell counting, a survey, with 21 references. Fisher Scientific Co. 6 3 3
CORCO
CHEMICAL CORPORATION Λΐσπι/focfurers of Reagent and Electronic Chemicals
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Tyburn Road & Cedar Lane, Fairless Hills, Pa. 19030 'Phone: (215) 295-5006 CIRCLE 3 3 O N READER SERVICE CARD
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Tic separations, bulletins on separa tions of tryptophan metabolites, sugars, creatine and creatinine, cortico-steroids, and uric acid and its impurities. J. T. Baker Chemical Co. 634
IS WATERS' MODEL R-401 REFRACTOMETER ANY GOOD? Ask our competitors! The R-401 has been installed in many of our c o m p e t i t o r s ' most expensive liquid chromatographs. Why? This unique opti cal deflection detector provides t h e reliability and sensitivity found in no other refractometer.
Features of the R-401 include: • • • • • • •
Stable at high flow rates Leak-free Temperature-change com pensated 512 to 1 dynamic range Linear calibration Unaffected by dirt, films, or air bubbles 1.00 to 1.75 Rl range
Let us know what liquid chromatograph you operate and we will send you the facts on the R-401 and show you how easy it is to install it in your instrument. On the other hand, if you a l r e a d y o w n e d one of t h e Waters' liquid chromatographs which feature the R-401 as the pri mary detector, you wouldn't have to go to all this bother, would you?
T T WATERS ASSOCIATES 61 Fountain Street Framingham, Mass. 01701 CIRCLE 1 9 7 O N READER SERVICE CARD
ANALYTICAL CHEMISTRY, VOL. 44, NO. 3, MARCH 1972
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