With the new

PIPETMAN You're all set . . .

. . . DIGITALLY Set ANY VOLUME (even odd volumes like 11.5 Ml, 113.6 Ml or 2,254 μ I) with m crometer precision and pipette with consistent accuracy — better than 0.2 to 1.0% of full range.

Four digital mi­croliter pipettes, continuously ad­justable over their entire range, permit optimal accuracy and reproducibility in critical pipetting. Each model can replace 30 or more fixed range units.

Comfort-con­toured body of high impact plas tic has low ther­mal coefficient insuring excel­lent repeatabil­ity even with long-term, hand-held operation.

Now Available from Stock

Built-in Tip Ejector (Models P-20, 200, 1000) permits safe, non-contact disposal.

RAININ INSTRUMNETS CO INC

Model No. Ranges Price

P-20D 0 - 20 μΙ $ 99.50 P-200D 20 - 200 μΙ 99.50 P-1000D 200 - 1000 μΙ 99.50 P-5000D .500-5000 μΙ 125.00

All models supplied with 10 disposable tips.

94 Lincoln Street · Brighton, MA 02135 (617) 787-5050 · TELEX 94-0687

Manufacturers' Literature

Thin-Film Measurement. Describes the development of an inexpensive interfer­ometer technique for the measurement of thin f i lms and analyzing surfaces. 2 pp. Hacker Instruments Inc. 434

HPLC Detectors. Wall chart lists the significant features of many continuous­ly variable wavelength absorption moni­tors for HPLC. Schoeffel Instrument Corp.

437

Electrodes for pH Meters. Wall chart pictures and describes all types of glass, combination, and reference elec­trodes. Sargent Welch Scientific Co.

438

Electronic Balances. Describes seven new electronic and mechanical bal­ances especially designed for school use. 16 pp. August Sauter of America, Inc. 439

Analysis of Catalysts. Reports on the analysis of five catalysts using a new energy-dispersive x-ray f luorescence technique. 6 pp. Ortec Inc. 440

Catalogs

CIRCLE 179 ON READER SERVICE CARD

1162 A · ANALYTICAL CHEMISTRY, VOL.

Precious Metal Chemicals. Lists nearly 200 compounds and coordination com­pounds made from platinum, palladium, ruthenium, rhodium, iridium, osmium, and gold. 16 pp. Matthey Bishop, Inc.

441

Nuclear Laboratory Equipment. De­scribes complete product line including neutron/gamma shielding, pneumatic transfer systems, and activation foils and flux wires. 28 pp. Reactor Experi­ments, Inc. 442

Capillary Columns. Contains informa­tion on applications, column evaluation, glass capillaries with five different sta­tionary phases, column test mixtures, and necessary accessories. 8 pp. Su-pleco, Inc. 443

Medical Diagnostics Products. Details a wide selection of clinical products in­cluding kits for manual analytical and diagnostic kinetic assays, colorimetric kits, RIA kits, and antigen/antibody kits. 36 pp. ICN Pharmaceuticals, Inc. 444

Materials for Research. Includes list­ings of nearly all metals, up to 9 9 . 9 9 9 + % pure, in a variety of physi­cal forms as well as sections devoted to metallic single crystals, ceramic powders, and equipment for the metal­lurgical and materials researcher. 150 pp. Materials Research Corp. 445

Laboratory Supplies. Contains over 6000 science supply necessities includ­ing pH meters and electrodes, UV spec­trophotometer cells, labware, and lab safety equipment. 228 pp. Markson Science Inc. 446

Research Equipment for Life Sci­ences. Describes company's full line including biological shakers, controlled environment shakers and incubators, fermenters, process control instrumen­tation, freeze dryers, steril izers, and other accessory equipment and instru­mentation. 196 pp. New Brunswick Sc i ­entific Co., Inc. 448

Reagent Chemicals. Describes the Tar­get line of reagents including acids, in­organics, and specialties that meet stringent quality standards. 24 pp. Ash­land Chemical Co. 450

Laboratory Supplies. Features modern laboratory apparatus, appliances, glass­ware, instruments, chemicals, and supplies for all types of laboratories. 432 pp. LaPine Scientif ic Co. 452

Chromatography Adsorbents and Supplies. Reviews various chromato­graphic techniques including open col­umn, thin layer, liquid, and affinity and includes applicable adsorbents, their specif ications, and prices. 36 pp. ICN Pharmaceuticals, Inc. 453

HPLC Pure Biochemicals. Contains 92 purified biochemicals including nucleo­sides, nucleotides, and analogs. ICN Pharmaceuticals, Inc. 447

Vacuum Measurement and Process Control. Features complete line of equipment available for vacuum gaug­ing and control. 20 pp. Edwards High Vacuum, Inc. 449

Laboratory Equipment. Contains com­plete line of items including balances, glassware, incubators, refrigerators, or­ganic and inorganic chemicals, ovens, microscopes, laboratory furniture, fume hoods, sinks, instrumentation appara­tus, and supplies. 693 pp. Scientific & Industrial Sales 451

AutoAnalyzer Supplies. Lists accesso­ries, glassware, and reagents for Tech-nicon AutoAnalyzer systems as well as rebuilt AutoAnalyzer I and II modules. 44 pp. Alpkem Corp. 45*

Biochemical Catalog. Lists over 200 biochemical and related compounds plus the components and instrument systems developed by the company. 32 pp. Chemical Data Systems 45£

49, NO. 13, NOVEMBER 1977