micromeritics® instrument corporation | Analytical Chemistry

ACS Nano. Breaking the Time Barrier in Kelvin Probe Force Microscopy: Fast Free Force Reconstruction Using the G-Mode Platform ...
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Books for solids, solutions, and microsamples. Semiquantitative and universal methods, advances in continuous cur­ rent discharges (arcs), and matrix ef­ fects highlight P a r t III. T h e applica­ tions of the time-resolution technique keynote P a r t IV, and the development of emission sources other t h a n arcs and sparks is emphasized in P a r t V. P a r t VI surveys the present state-ofthe-art. Advances in Mass Spectrometry in Biochemistry and Medicine, Vol. 1. Al­ berto Frigerio and Neal Castagnoli, Eds. 586 pages. Halsted Press, 605 Third Ave., New York, N.Y. 10016. 1976. $40 This volume contains the proceed­ ings of the 2nd International Sympo­ sium of Mass Spectrometry in Bio­ chemistry and Medicine held J u n e 1974 in Milan, Italy. T h e conference was sponsored by the Mario Negri In­ stitute for Pharmacological Research to provide an opportunity for the con­ tinued exchange of information in the rapidly expanding application of mass spectrometry for the analysis of bio­ logically active compounds. Fifty-one papers contributed by over 140 au­ thors examine all aspects of mass

spectrometry, gas chromatographymass spectrometry, and gas chromatography-mass spectrometry-computer systems for the analysis of complex mixtures of biological origin.

Continuing Series Residue Reviews, Vol. 60. Francis A. Gunther, Ed. vi + 160 pages. SpringerVerlag New York Inc., 175 Fifth Ave., New York, N.Y. 10010. 1976. $18.80 " S u m i t h i o n " is a trade name regis­ tered by Sumitomo Chemical Co., Ltd., of J a p a n for its proprietary for­ mula Ο,Ο- dimethyl 0-(3-methyl-4nitrophenyl) phosphorothioate, an organophosphorus insecticide having a broad range of insecticidal effect and yet having low toxicity to mammals and fish to make its handling of less concern. Much of the information compiled in this volume on "Sumi­ thion" comes from members of Sumi­ tomo Co. engaged in the research and development of the compound. Five chapters written by 13 authors con­ centrate on discussions of different chemical aspects of the compound.

T h e first two chapters review general chemistry and available analytical methods used to determine the com­ pound when it is present in technical products and formulated materials. T h e next two chapters discuss formu­ lation of " S u m i t h i o n " and its effect on biological systems. Finally, the last chapter describes the residue analysis. Also included in this 60th volume of the series are (as in volumes 10, 20, 30, 40, and 50) an abbreviated 10-volume table of subjects, a 10-volume author index, and 10-volume cumulative subject matter index. Separation and Purification Methods, Vol. 4. Edmond S. Perry, Carel J. van Oss, and Eli Grushka, Eds. Marcel Dekker, Inc., 270 Madison Ave., New York, N.Y. 10016. 1976. $32.50 T h e separation and purification techniques reviewed in this volume are a t least as diverse as they were in the previous three volumes. They range from modernized distillation methods to modern countercurrent distribution techniques, to name only a few. Seventeen authors of this vol­ ume are all new to the series. T h e ex­ tensive literature references provided

AUTOMATIC SAMPLE INJECTION FOR HPLC • Automatic, Unattended operation —Up to 64 samples with 1, 2 or 3 injections per sample. Needs only 0.7 ml of sample.

• Positive Sampling —Delivers precise, reproducible sample volumes with negligible carry-over between samples.

• Inexpensive, Disposable Glass Sample Vials — Polyethylene caps give positive seal to prevent sample loss. • Unique Positive Flow Design —Uses vial cap as piston to discharge sample. • Motorized Injection Valve —reliable, 6,000 psi operation. A 10-μΙ loop is standard. • Microprocessor Operated —Controls injections per sample, injection time, rinse between samples and automatic shut down for malfunction and completion of last sample. • Self-Contained — Requires no compressed gas. Needs only electrical power for operation. • Versatile—Usable with any HPLC system and can be ex­ ternally controlled by computer/integrator. ®

Materials Technology

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Chromatography

micromeritics® instrument corporation Model 725 Automatic Injector

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ANALYTICAL CHEMISTRY, V O L . 4 8 , NO. 12, OCTOBER

1976 · 9 9 7 A