Swagelok®

® Unique Swaging Action • Provides a seal between ferrule and body at a point different from where the heavy work is performed · Supports tube ahead of seal to resist vibration · Does not create torque or leave residual strain on tubing · Does not significantly reduce flow area. Inspection Gage Assures Sufficient Pull-Up • Useful for both the installer and inspector • If the gage will not fully enter the gap between the nut and body shoulder, fitting pull-up is sufficient · If the gage enters the gap, you'll know pull-up is incomplete. Effective Metol-to-Metol Seal • Interaction of precision parts — body, front ferrule, back ferrule and nut — produces a leak-free seal with simple 1-1/4 turn pull-up • Works on thick or thin wall tubing · Seals repeatedly under make-and-break conditions · Seals consistently over a wide range of pressures, temperatures and temperature cycling. Only SWAGELOK Tube Fittings offer gageability of straight fittings, and forged shaped elbows and tees in stainless steel and steel. Gages are available for 1/8" through 1° sizes. Torque-free swaging action, effective sealing and gageability are just three of the many elements of excellence for which SWAGELOK Tube Fittings are known and respected.. .a tradition of Excellence. CRAWFORD FITTING COMPANY 29500 Solon Road, Solon, Ohio 44139 Crawford Fittings (Canada), Ltd., Ontario ©1981 MARKAD SERVICE CO./all rights reserved C-361 Books laboratory computers and provides the reader with discussions on computer terminology, advances in hardware and software, and how to best use computers in the laboratory. In spite of the shortcomings mentioned above, this book is very readable, well illustrated, and the subjects are all treated to a uniform depth. Al- though several chapters do not strictly deal with physical characterization of foods they certainly do fall within the scope of the series. Fourier Transform N.M.R. Spectros- copy. 2nd ed. Derek Shaw, xi + 344 pp. Elsevier Science Publishing Co., 52 Vanderbilt Ave., New York, N.Y. 10017. 1984. $75 Reviewed by Thomas Farrar, Depart- ment of Chemistry, University of Wisconsin, 1101 University Ave., Madison, Wis. 53706 For the most part, the second edition of this book is very like the first and has the same strengths and weaknesses. A number of new sections are added to accommodate some of the more important recent developments, such as two-dimensional Fourier transform NMR and NMR imaging. The Introduction and Chapter 2, "Principles of Magnetic Resonance," are very interesting and well done. Chapter 3, "The Mathematics of Fourier NMR," is a reasonably complete, clear, and accurate presentation of the principles on which FT-NMR is based. The basic pulsed NMR experiments are covered in Chapters 4 ("Ex- citation Techniques in NMR") and 5 ("Pulsed NMR"). In Chapter 5 we find the first material not present in the first edition. The presentation of multipulse and composite pulse techniques to the NMR observation channel is well done, and a few examples are given. For some reason the author makes no mention of the rather substantial advances that have taken place in decoupling experiments as a result of sophisticated multipulse experiments in the decoupling channel (for example, MLEV and WALTZ). Chapter 6 on instrumentation is rather weak and misses what in my view is one of the central points about the modern NMR spectrometer—the computer is the heart and mind of the spectrometer. It plays a central, vital role in every aspect of all NMR experiments. It controls the pulse timing and rf phase of the pulses in observe, lock, and decouple channels; it controls all aspects of the various rf receivers; and, of course, it is fully responsible for the large and complex CIRCLE 32 ON READER SERVICE CARD 456 A · ANALYTICAL CHEMISTRY, VOL. 57, NO. 3, MARCH 1985 Swagelok TUBE FITTINGS TUBE FITTINGS

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Unique Swaging Action • Provides a seal between ferrule and body at a point different from where the heavy work is performed · Supports tube ahead of seal to resist vibration · Does not create torque or leave residual strain on tubing · Does not significantly reduce flow area.

Inspection Gage Assures

Sufficient Pull-Up

• Useful for both the installer and inspector • If the gage will not fully enter the gap between the nut and body shoulder, fitting pull-up is sufficient · If the gage enters the gap, you'll know pull-up is incomplete.

Effective Metol-to-Metol Seal

• Interaction of precision parts — body, front ferrule, back ferrule and nut — produces a leak-free seal with simple 1-1/4 turn pull-up • Works on thick or thin wall tubing · Seals repeatedly under make-and-break conditions · Seals consistently over a wide range of pressures, temperatures and temperature cycling.

Only SWAGELOK Tube Fittings offer gageability of straight fittings, and forged shaped elbows and tees in stainless steel and steel. Gages are available for 1/8" through 1° sizes. Torque-free swaging action, effective sealing and gageability are just three of the many elements of excellence for which SWAGELOK Tube Fittings are known and respected.. .a tradition of Excellence.

Books

laboratory computers and provides the reader with discussions on computer terminology, advances in hardware and software, and how to best use computers in the laboratory.

In spite of the shortcomings mentioned above, this book is very readable, well illustrated, and the subjects are all treated to a uniform depth. Although several chapters do not strictly deal with physical characterization of foods they certainly do fall within the scope of the series.

Fourier Transform N.M.R. Spectroscopy. 2nd e d . Derek Shaw, x i + 344 pp . Elsevier Sc ience Publishing Co. , 52 Vanderbi l t Ave. , New York , N.Y. 10017. 1984. $75

Reviewed by Thomas Farrar, Department of Chemistry, University of Wisconsin, 1101 University Ave., Madison, Wis. 53706

For the most part, the second edition of this book is very like the first and has the same strengths and weaknesses. A number of new sections are added to accommodate some of the more important recent developments, such as two-dimensional Fourier transform NMR and NMR imaging.

The Introduction and Chapter 2, "Principles of Magnetic Resonance," are very interesting and well done. Chapter 3, "The Mathematics of Fourier NMR," is a reasonably complete, clear, and accurate presentation of the principles on which FT-NMR is based. The basic pulsed NMR experiments are covered in Chapters 4 ("Excitation Techniques in NMR") and 5 ("Pulsed NMR"). In Chapter 5 we find the first material not present in the first edition. The presentation of multipulse and composite pulse techniques to the NMR observation channel is well done, and a few examples are given. For some reason the author makes no mention of the rather substantial advances that have taken place in decoupling experiments as a result of sophisticated multipulse experiments in the decoupling channel (for example, MLEV and WALTZ).

Chapter 6 on instrumentation is rather weak and misses what in my view is one of the central points about the modern NMR spectrometer—the computer is the heart and mind of the spectrometer. It plays a central, vital role in every aspect of all NMR experiments. It controls the pulse timing and rf phase of the pulses in observe, lock, and decouple channels; it controls all aspects of the various rf receivers; and, of course, it is fully responsible for the large and complex

CIRCLE 32 ON READER SERVICE CARD

456 A · ANALYTICAL CHEMISTRY, VOL. 57, NO. 3, MARCH 1985

Swagelok TUBE FITTINGS

TUBE FITTINGS