REPORT FOR ANALYTICAL CHEMISTS
Applications of Oscillators
4.28 4.89 4.89 12-130 130 0.1-3 120 4.89 2.1 10-30
ANAL. CHEM., Ref. Baumann and Blaedel, 28, 2 Weaver, et al., 28, 329 Grant and Haendler, 28, 415 Johnson and Timnick, 28, 889 Lippincott and Timnick, 28, 1690 Kupka and Slabaugh, 29, 845 Johnson and Timnick, 30, 1324 Mukherji and Sant, 31, 608 Ishii, et al., 31, 1586 Walker, et al, 32, 9
Nuclear magnetic resonance spectrometry
12.3 16.2 30 27 6.88
Galles, et al., 28, 269 Guff y and Miller, 31, 1895 Chamberlain, 31, 56 Fujiwara and Wainai, 33, 1085 Rubin and Swarbrick, 33, 217
Dielectric constant
1 5 0.4-0.6 0.01-75 70
Axtmann, 24, 783 Monaghan, et al., 24, 193 Bvrne and Brockett, 28, 1207 Callinan, et al., 28, 1911 Winefordner, et ni., 33, 515
Time-of-flight mass spectrometry
2000-20,000 cycles/ second
Gohlkc, 31, 535
Electrodcless discharge for emission spectrography
40.68 megacycles/ second
Keller and Smith, 24, 796
R F spark source for mass spectrometry
ca. 10 megacycles/ second
Baun and Fischer, 34, 294
Electron absorption detector for gas chromatography
1 0.5-0.7
Lovelock and Zlatkis, 33, 1958 Landowne and Lipsky, 34, 726
pH-Stat, position sensor in control section
1
Wood, 32, 537
Electron magnetic resonance spectrometry
9150 megacycles/ Roberts, et al., 33, 1879 second modulated Saraceno, et al., 33, 500 at 100 kilocycles/ Yen, et al, 34, 694 second
Microwave absorptiometry
10,000 megacycles/ second
Application
Frequency
ter, it is generally "chopped" by an electromechanical device, and the resulting oscillation is " s h a p e d " into a wave form appropriate for subsequent circuitry. I n a spectrophotometer, the chopping m a y be accomplished by means of a rotating sectored shutter or mirror, which periodically interrupts or redirects the light beam ; a set of com-
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TYGON
TUBING
Merritt, 34, 293
m u t a t o r contacts mounted on the shaft of this rotating component produces an electrical signal t h a t has a definite frequency and phase relationship to the fluctuating light signal. Oscillator circuits are also employed to create a controlled timing or synchronizing function for a v a riety of applications. If the out-
The world over, more laboratories have standardized on Tygon plastic Tubing than on any other brand. No other tubing is "just as good a s " Tygon. For your protection, every foot is permanently branded with the name TYGON and the formulation number. 225-H
Plastics & Synthetics
Division
U. S. STONEWARE AKRON 9. OHIO Circle Na. M M Reiders' Smite Card VOL. 34, NO. 8, JULY 1962
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31 A
