NEW
PRODUCTS
CAHN ELECTROBALANCES the finest instrumentation for:
automatically
•V-PARTIAL SPECIFIC VOLUME . . . . · Molecular weight with the Ultracentrifuge
•SURFACE TENSION
....
Wilhelmy or Du Nouy Dynamic, Continuous
• T G A - M A C R O or MICRO •ADSORPTION ISOTHERMS
TECHNOLOGY MILTON
ROY
NOTES COMPANY
high accuracy instrumentation pump is ideal for ultra-low flow applications
•PARTICLE SIZE DISTRIBUTION 1 -100 μ
FLUID FROM
Two-in-one microphotometer mea sures spectrum line intensities on both photographic plate a n d x-ray f i l m . The Hilger & Watts microphotom e t e r s c o n s i s t of t h r e e m a i n u n i t s : t h e base, the carriage a n d plate stage, and the over-arm. The instrument quickly converts from a nonrecording to a recording tape instrument. The emission optical system can also be r e p l a c e d w i t h o p t i c s f o r e x a m i n i n g xray f i l m . Engis E q u i p m e n t Co., 8 0 3 5 Austin Ave., Morton Grove, III. 60053 411
Gravimetrically with advantages
• SURFACE CHEMISTRY CORROSION Only practical unit available
• MAGNETIC SUSCEPTIBILITY Faraday or Gouy
PLUS
•ULTRAMICROBALANCES
A u t o m a t i c Fluorine Distillation A p p a r a t u s
An automatic fluorine distillation ap paratus, which operates on the method of Willard and Winter, is similar to that of Schall and Williamson. A mer cury bulb thermoregulator controls a solenoid valve, adding water as neces sary to the distillation mixture. Pot temperature is held at 135° ± 1.0° C. Rate of distillation is 2-3 ml/minute. Laboratory Equipment Corp., Hilltop Ed., St, Joseph, Mich. 49085 412
Use them anywhere Capacities to 1.5 grams Sensitivities to 0.1 microgram From $820 to $1105
• RECORDING BALANCES For vacuum, noxious atmosphere or air Capacities to 100 grams Sensitivities to 0.1 microgram From $2480 to $4500
• AUTOMATIC BALANCES Analog and digital recording Fully automatic or manual sample feed 25 samples per minute
ALSO
• FREE REPRINTS On many analytical techniques
Phone or Write for details
CAHN INSTRUMENT
COMPANY
7500 Jefferson St., Paramount, Calif. 90723 (213) 634-1935 27 Essex Rd„ Dartford, Kent, U.K., Ph. 21540 Circle No. 55 on Readers' Service Card
Recording fluorescence spectropho tometer combines a dual high energy grating monochromator system with a stable xenon source, a ratio-recording electronic system, and a potentiometric recorder. Sensitivity of t h e Hita c h i M o d e l M P F - 2 A is 1 p p b o f q u i n i n e s u l f a t e in O . I N s u l f u r i c a c i d a t 3 5 0 ΓΠμ, w i t h a n o i s e level o f l e s s t h a n 1 % f u l l s c a l e . R e s o l u t i o n is 0 . 5 π\μ. Accessories for phosphorescence, controlled temperature operation, and polarization measurement are avail able. Perkin-Elmer Corp., Main Ave., Norwalk, Conn. 0 6 8 5 2 413
INSTRUMENT miniPUMP© $331.00 S i m p l e x $574.00 D u p l e x F.O.B. St. Petersburg, Florida
Chromatography columns, lowflow lab equipment, industrial wet process analyzers and other equipment requiring highly accurate, extremely low flows also require a high degree of reliability. The Milton Roy Instrument miniPump is designed to provide all these in a convenient, compact design. The simplex Instrument miniPump delivers from 16 to 460 m i l l i l i t e r s / hour with repetitive accuracy of at least ± 0 . 3 % . Capacity adjustable over full range by micrometer dial, even while pump is operating. Sapphire plunger and ball-seats. Duplex model also available. Order direct or write for additional data. Ask for bulletin 25.002. Write: Milton Roy Company, P.O. Box 12169, St. Petersburg, Fla. 33733.
MILTON ROY
compaNY ST. PETERSBURG, FLORIDA
Circle No. 83 on Readers' Service Card VOL. 39, NO. 1 1 , SEPTEMBER 1967
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