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REAGENT GRADE CHEMICALS When you buy reagent or elec tronic grade chemicafs from CORCO, you get products from a manufacturer whose entire pro duction is devoted to this type of chemicals. We know your needs and how to meet them. GUARANTEED PURITY—Corco reagent acids, bases, volumetric solutions, solvents and electronic chemicals are in accordance with recognized standards of purity. ADVANCED PACKAGING—We are continually developing new and better ways to improve our pack aging- to save risk of contamin ation,· to assist in handling; and to reduce freight. SAFETY IH HANDIING-Corco product packaging is designed with the user in mind—his safety; container weight, size, shape and materials of construction. Even the labels are designed for quick identification.
PROMPT DELIVERY from our stock. Some of the nation's largest com panies have come to us for cus tom synthesis. We welcome inquiries.
CHEMICAL CORPORATION Manufacturers of Reagent and Electronic Chemicals Tyburn Road & Cedar Lane, Fairless Hills, Pa. 19030 'Phone: (215) 295-5006
NanoSpec/10 computerized microspectrophotometer system measures, compares, and records ultraviolet, visible, and near infrared spectral data from a variety of specimens under high magnification in an optical microscope. The high-sensitivity system offers unusual capa bility for quantitative fluorescence and absorption spectroscopy and is particularly applicable in biology, geology, thin films and plastics studies, general chemistry, and particle analysis. It also allows component analysis in thin-layer and capillary liquid chromatography. System complete with microcomputer priced at less than $20,000. Nanometrics 402
Plasma Spectrometer
Specimen Stage
Spectraspan III, a new line of plasma spectrometers for trace element analy sis, provides safe, economical systems for qualitative measurements in a pho tographic operational mode and quanti tative measurements in either of two photoelectric modes both under com puter control. The systems feature matched components which permit rapid conversion between operating modes. They also provide improved de tection limits and a wide linear dynamic range, eliminate most interferences, and perform true trace-level analysis. Spectrametrics, Inc. 416
Model 15-600 provides a convenient means for mounting and positioning specimens for analysis in ultrahigh vac uum test chambers. It is the first UHV device available as a component that offers the high stability and precise specimen motion desired for instru ments that utilize a small diameter probe beam. It incorporates a number of user-oriented features such as builtin gasket clips and multiple sample car rousel specimen mounts. Physical Elec tronics Industries, Inc. 418
Digital Wavelength Programmer V a r i a b l e R a t i o Digital Diluter/Dispenser Two models of the precision variable diluter/dispenser feature "dial-in" volume selection, digital volume display, mini mum dead volume, detachable probe, and foot switch. The micro model sam ples from 20 to 250 μΙ and dilutes in from 0.25 to 2.50 ml. The macro model samples from 20 to 250 μΙ and dilutes in from 1.20 to 12.50 ml. Hyperion, Inc. 415
CIRCLE 3 5 O N READER SERVICE CARD 62 A ·
ANALYTICAL
CHEMISTRY,
V O L . 4 8 , NO. 1, J A N U A R Y
1976
Model 17-00, which can be attached to any monochromator or spectrophotom eter to increase its capability, is de signed with advanced logic circuits which allow convenient and reproduc ible recording of spectral data. Push button selection of five different scan speeds over a 50:1 range, either for ward or reverse, is provided. A unique feature is wavelength scan interval se lection of any scan range from 10 to 800 units. $585 without recorder and $1595 with recorder accessory. Na nometrics, Inc. 411
