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Varian A-60 instrument

Vapor phase chromatography was used to analyze allylic oxidation products. The column, inch X 35 feet, was packed with 20% UCON 5100 on Celite (50-70). NMR analyses were performed using a Varian A-60 instrument. Molecular weights were determined by cryoscopic methods (benzene and acetic acid solvents). Organoselenium compounds were analyzed for selenium by the method of Gould (2), which involves wet digestion of the sample, followed by iodometric titration of the selenium dioxide produced. [Pg.346]

In contrast is the hugely successful American firm of Beckman Instruments, which constructed and marketed pH meters from 1935 and the DU Spectrophotometer from 1941. Papers of a biographical nature based on interviews with Arnold Beckman have been published.104,105 The development of nuclear magnetic resonance spectrometers by the firm of Varian is considered in another paper, with emphasis on the introduction of the Varian A-60, the first commercial instrument intended for the broadly trained chemist as opposed to the custom-built tools for the research specialist.106... [Pg.223]

Kinetic Experiments. Kinetic data were obtained by NMR techniques. In general the intensity of the H20 (or CF3COOH) peak was followed as a function of time with a Varian A-60 NMR analytical spectrometer. The instrument was equipped with a variable temperature probe and a V-6040 temperature controller capable of maintaining temperatures as low as —60° C. with a precision of dbl° C. [Pg.139]

NMR Determination. Any NMR instrument capable of detecting protons and equipped with an integrator should be suitable. In the Rocketdyne work, the Varian DP-60 was used, although the Varian A-60 or HA-56/60 would be equally applicable. [Pg.239]

B5. Bible, R. H., Nuclear magnetic resonance instrumentation since the Varian A-60. Appl. Spectrosc. 24, 326-331 (1970). [Pg.365]

Fig. 2. Nuclear magnetic resonance spectrum of sodium secobarbital instrument Varian A-60... Fig. 2. Nuclear magnetic resonance spectrum of sodium secobarbital instrument Varian A-60...
Fig.3 NMR spectrum of triamcinolone, Squibb House Standard 30197-503 in deuterodimethylsulfoxide containing tetramethylsilane as internal reference. Instrument Varian A-60... Fig.3 NMR spectrum of triamcinolone, Squibb House Standard 30197-503 in deuterodimethylsulfoxide containing tetramethylsilane as internal reference. Instrument Varian A-60...
The reaction flasks were stoppered with rubber caps, so that samples could be withdrawn at the proper time interval with a hypodermic syringe. The flasks were immediately placed in a water bath controlled at 25°C. Samples withdrawn from the reaction flasks were placed in a 0.1 mm cell (Connecticut Instrument Corporation, Type FT) using Irtran-2 crystals. The infrared spectrum was scanned in the A.5 micron region using a Perkin-Elmer Infracord, Model 257 Spectrometer. When the isocyanate peak was reached, the time was noted. NMR studies were carried out on a Varian A-60 high resolution spectrometer. [Pg.395]

Figure 3 NMR Spectrum of fluphenazine enanthate, Squibb batch 10 in CDCI3. Spectrum 10450. Instrument Varian A-60. [Pg.250]

The NMR measurements were obtained at 24.288 Me with a Varian high-resolution spectrometer. The chemical shifts are reported relative to 85% phosphoric acid. A Varian A-60 spectrometer was used to obtain H NMR data. The instrument was calibrated with tetramethylsilane and chloroform. The measurements were made on samples prepared with constant ligand concentrations. [Pg.225]

Infrared spectra were determined using Perkin-Elmer infrared spectrophotometers models 137-B and 21. NMR spectra were run using Varian T-60 and A-60 spectrometers. Gas chromatographic analyses were done on a Hewlett-Packard model 5750B instrument. Fractional distillations were performed on a Nester-Faust 18-inch semimicro spinning band column equipped with a stainless steel band. [Pg.94]

The proton NMR spectmm shown in Fig. 4.3 has been recorded with a Varian continuous wave instrument at 60 MHz on a dcuterized chloroform solution of PBO. [Pg.57]

The A-60 was the instrument of change. Built in Palo Alto, California, by Varian Associates, it was a hands-on, routine instrument that graduate students in chemistry could operate. Precalibrated charts, together with an internal lock on a water sample tube, allowed for a single sweep to record a spectrum (Anon. 1961). The A-60 brought NMR to the masses. Chemists took to it like fish to water (Jackman 1996). [Pg.338]

While the instrument whose block diagram is shown at right was specifically intended to do 13C Fourier transform NMR at 15.1 MHz in liquid samples, it could be used for a variety of nuclei in liquid and solid samples. It uses a Varian DP-60 magnet, normally operated at 14.1 kG. [Pg.358]

In 1960, Varian Corporation built and marketed the first commercial NMR spectrometer, the 60 MHz A-60 model (see the photograph). It was a workhorse that brought NMR spectroscopy to chemistry departments industrial and academic, large and small during the 1960s. Not long afterward, Varian marketed the HA-100 (100 MHz provides separations of peaks 67 percent better than 60 MHz), and by the end of the decade, some elite corporations and universities were acquiring 220 MHz instruments. The most powerful analytical tool in the chemist s laboratory had arrived and yet its fabulous future potential was only dimly perceived. [Pg.196]

DSC data were obtained on an Omnitherm thermal analysis unit. Infrared spectra were collected with a Nicolet 60SX FTIR spectrophotometer. H-NMR were measured on a 60 MHz Varian EM-360 instrument. Viscosity was determined using an Ubbelohde viscometer tube timed to 0.1% repeatability in a constant temperature bath at 30.0 0.05 C UV-Vis-NIR Spectra were recorded on a Cary 17D spectrophotometer. Titrations (pH monitoring) were followed using a Corning 130 pH meter hooked up to a strip chart recorder. [Pg.279]

Gas Chromatography-Mass Spectrometry (GC-MS) analysis was carried out on a Varian instrument coupled to a Nermag R10-10 quadrupole mass spectrometer. Separation was achieved on a JW DB1 (60 m, 0 0.32, film thickness 0.25 p) capillary column. [Pg.181]


See other pages where Varian A-60 instrument is mentioned: [Pg.205]    [Pg.237]    [Pg.385]    [Pg.326]    [Pg.205]    [Pg.237]    [Pg.385]    [Pg.326]    [Pg.238]    [Pg.40]    [Pg.39]    [Pg.101]    [Pg.238]    [Pg.429]    [Pg.269]    [Pg.270]    [Pg.529]    [Pg.105]    [Pg.67]    [Pg.500]    [Pg.348]    [Pg.28]    [Pg.37]    [Pg.377]    [Pg.101]    [Pg.358]    [Pg.68]    [Pg.381]    [Pg.378]    [Pg.193]    [Pg.378]    [Pg.181]    [Pg.709]    [Pg.72]    [Pg.1082]   
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