RIBER DATA SYSTEMS - Analytical Chemistry (ACS Publications)

---

Books

DIGBY D. MACDONALD

Transient Techniques in Electrochemistry nize the topics into readable text. The result is a welcome addition to the electrochemical literature, one that appears suitable for both an advanced course and for use as a reference. The theory of transient methods is logically presented in four chapters according to the controlled experimental variable: potential step, current step, potential sweep, and ac impedance. Hydrodynamic methods are not included. In each chapter the presentation is reasonably uniform in that the response function is first developed for diffusion-controlled processes, then for charge transfer control, and finally mixed control. Coupled chemical reactions are then introduced for each technique. Equations are derived in detail for most cases, occasionally in a manner that is easier to follow than in the original literature. Only for a few, highly involved derivations is the reader referred to the original sources for details. Adsorption phenomena are included for several methods, and metal-alloy dissolution appears as a special topic in the chapter on potential step method. In the final chapter, a variety of surface processes—adsorption, electrocrystallization, passivation, and film growth—are described in terms of the same four techniques. Here, the treatment varies according to current developments and applications. All of this material follows an introduction to the mathematics of diffusion which includes mainly Laplace transform methods since nearly all equations are subsequently derived by this technique. The reader is made aware, however, of numerical methods, digital simulation, and analog methods. The level of presentation of

Get more GC/MS data without paying more W h e n you're thinking about a GC/MS data system, contact the people w h o help you get more useful data without taking a big chunk out of your budget. We first introduced the Riber 150, a versatile data system that is easily adapted to any GC/MS instrumentation. And w e vowed to make it a system which could easily be u p graded to keep pace with your state-of-the-art work. Next, we introduced Simultaneous Acquisition and Data Reduction (SADR), a revolutionary new foreground/ background software system that provides: • Simultaneous real-time acquisition and reduction of GC/MS data. • Fully unattended operation of such components as samplers and solvent divert valves. • Unattended data reduction such as library search, spectral presentations a n d reconstructed'Bieman gas chromatograms. Now we've introduced a distributive processing system that permits you to acquire and analyze GC/MS data in half the time and eliminate downtime due to single component failures. You get total interaction of the computers without interdependence of the system. The distributive processing system does all this and more at a cost comparable to other GC/MS data systems. If you plan to automate your GC/MS instrumentation, talk to the people w h o work hard to help you get more useful GC/MS data without paying more.

RIBER DATA S Y S T E M S 1020 C o r p o r a t i o n Way Palo Alto, Ca. 94303 (415) 961-2021 Telex 910-379-6474 In E u r o p e C o n t a c t : RIBERMAG, Rueill M a l m a i s o n , France Tel. 977.92.05

_„

ISA

' fflHIIil CIRCLE 2 0 9 O N READER SERVICE CARD

ANALYTICAL CHEMISTRY, VOL. 50, NO. 1 1 , SEPTEMBER 1978 · 1003 A