MANUFACTURERS' LITERATURE
Look what tiny tube fittings can make To any Chromatronix • fitting To pipe
Valve
"T" joint
To luer
To glass To metal tubing
Gas Chromatographs. "Imagineering With Carle Micro Volume Valves" pro vides solutions to 23 of the most cur rent valving problems faced by gas chromatographers. Carle Instruments, Inc., 1141 E. Ash Ave., Fullerton, Calif. 92631 612 Integrator. Series 200 integrator, an accessory for automatically computing peak areas recorded on a strip chart, is described in Bulletin 200, four pages. Disc Instruments, Inc., 2701 S. Halladay St., Santa Ana, Calif. 92705 613 Circuitry Design. Electrical charac teristics, design information, and a variety of applications of Flexprint cir cuitry are described in this 14-page handbook. Sanders Associates, Inc., Grenier Field, Manchester, Ν. Η. 03103 614 Guide to Stationary Phases for Gas Chromatography. More than 1000 compounds are indexed according to the materials separated in this 103-page booklet. Brief notes about the separa tion, such as the stationary phase used, the temperature, and the solid support, are also included. Analabs, Inc., P. O. Drawer 5397, Hamden, Conn. 06518 615
Optical Products. This revised 24page catalog discusses technical data and physical properties of optical glasses, fused quartz, Pyrex, and Vycor. Esso Products, Oak Ridge Rd., Oak Ridge, N. J. 07438 616 Chemically inert · N o mixing cavi ties * Quick connecting · Leakproof at 500 psi. Cheminert™ valves and fit tings will cut hours from the time you spend assembling tubing for chemical analysis. You can connect and d i s c o n nect everything with your hands, making finger-tight joints that won't leak at 500 psi. Π There are fittings for 1 / 1 6 " and 1 / 8 " t u b i n g . They h a n d l e n e a r l y any fluid because only chemically inert mate rials—Teflon, Kel-F and glass—touch the stream. All are designed with zero dead volume, so there will be no mixing. Π Other advanced Chromatronix apparatus includes precision pumps that produce unfluctuating flows at pressures up to 500 psi, and high-resolution columns for liquid chromatography. Send for catalog.
Spectrophotometer. Double-40 series multiconvertible spectrophotometers are presented in this four-page bro chure. The series features the modular block system which permits variety and flexibility. Shimadzu Seisakusho Ltd., 14-5 TJchikanda 1-chome, Chiyoda-ku, Tokyo, Japan 617 Titrimeters. Bulletin 9-313-200, eight pages, presents Model 35 for manual ti trations and Model 36 for automatic ti trations. Fisher Instrument Manufac turing Division, Fisher Scientific Co., Indiana, Pa. 618 Spectrographs
CHROMATRONIX Chromatronix, Incorporated, 2743 Eighth St., Berkeley, Calif. 94710. Phone (415) 841-7221 Circle No. 33 on Readers' Service Card 1 4 0 A · ANALYTICAL CHEMISTRY
Operating
Photovolt has basic ph meters to meet every acid test. At the top of the scale, Digicord: meticulously made and full-featured, with digital readout, expanded scale precision, solid state circuitry (accuracy, repeatability and stability within ± 0 . 0 0 2 pH). Photovolt's compact, durable new Digicord, priced well below its performance. $445.00 Plus the famous "Set and Forget" meters: Model 126A, our portable heavy duty blue ribbon workhorse offers sealed waterproof construction to operate under the worst ambient conditions $335.00 Need low cost reliability? Buy 85A, using AC or battery. Single range 0-14, 3¥i" scale readable to 0.05 pH. Solid state; fully stabilized. Budget priced: $149.00 A full line of Photovolt pH meters are available. Send now for complete data
Supplies.
Spectroscopic powders, preformed elec trodes, standards, and other acces sories are included in this 16-page catalog. Jarrell-Ash Co., 590 Lincoln St., Waltham, Mass. 02154 619
PHOTOVOLT
1115 Broadway, New York, N. Y. 10010 Phone (212) 989-2900 Circle No. 62 on Readers' Service Card
