MANUFACTURERS LITERATURE
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Gel Filtration. A 10-page brochure describes the new Sephadex LH-20, a lipophilic derivative of Sephadex which extends the gel filtration technique to organic solvents. The booklet contains technical information on handling char acteristics and lists some of the separa tions which can be accomplished. Pharmacia Fine Chemicals, Inc., 800 Centennial Ave., Piscataway, N. J. 08854 601 Analytical Chemicals. Deuterated solvents, solvents and internal stand ards for NMR and IR spectrometry, ultrapure reagents, and Titrisols (con centrated normal solutions in special ampoules) from E. Merck (Darmstadt) are included in a 15-page price list, P102, effective June 1, 1966. Brinkmann Instruments Inc., Westbury, Ν. Υ. 11590 602
Write for Product Bulletins. Gelman Instrument Company 600 S. Wagner Rd. Ann Arbor, Michigan 48106
Filter Papers. Technical Bulletin F-3 is a compilation of data on Whatman filter papers for air sampling. It con tains a general description of each type, physical characteristics, filtration char acteristics, and other properties. Reeve Angel, 9 Bridewell PL, Clifton, N. J. 07014 603 Gas Chromatograph. A gas chromatograph and a full line of accessories, designed primarily for the educational field, are described in Bulletins B5661 and B5662. Carle Instruments, Inc., 532 S. Rose St., Anaheim, Calif. 92805 604
Bibliography. A 24-page bibliogra phy covers separations of proteins, en zymes, hemoglobins, hormones, serum proteins, viruses, miscellaneous pro teins, nucleic acids and derivatives, and polysaccharides on ion exchange cellu loses. Reeve Angel, 9 Bridewell PL, Clifton, N. J. 07014 605 Metallographic Apparatus. A 4-page bulletin describes the Knuth system which comprises a complete range of metallographic equipment and is based on wetgrinding with water-resistant sili con carbide paper, electrolytic polish ing, diamond polishing, and electrolytic lap-polishing. William J. Hacker & Co., Inc., P.O. Box 646, West Caldwell, N. J. 07006 606
Circle No. 155 on Readers' Service Card
New Refractive index Flow Monitor Ν ester/Faust's Model 404 Refractive Index Flow Monitor provides contin uous readout (and strip chart record ing) of R.I. changes of sample c o m ponents as they elute from a liquid c o l u m n , reaction vessel or still. Refrac t i v e index is one of the most univer sally useful properties of materials since it affords high measurement sensitivity and is non-destructive to the sample. T h e versatile 404 is i n expensive, accurate, and has a wide measurement range capable of moni toring darkly colored materials. Send for technical literature t o d a y .
NESTER EAUST
SWGLE SOLVENT ÊLUTION SAMPLE-NONKiNiC SURFACTANTS RANGE-O.OOOT Rl UNITS FULL SCALE
Specifications Ranges—1.30 to 1.45 Rl Units 1.45 to 1.60 Rl Units Sensitivity—0.0005 Rl Units full scale (One mv recorder) Internal Volume—1.1 ml Detector Type—Dual differential Price—Under $800.00
Instrument Products Division 2401 Ogletown Road, Newark, Del. 19711 "see Laboratory Guide for all Products/Sales Offices" Circle No. 50 on Readers' Service Card V O L . 3 8 , N O . 9 , AUGUST 1 9 6 6
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