Our all-glass U-column GC may well be the established standard in

servicing of one zone while operating a detector at full ... and service offices in major cities from coast to coast. ... Circle No. 138 on Readers' S...
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Our all-glass U-column GC may well be the established standard in the life sciences. HERE ARE SOME OF THE REASONS WHY NUCLEAR-CHICAGO'S SERIES 5000 HAS ACHIEVED SUCH WIDE ACCEPTANCE: Reason No. 1.

Reason No. 3.

Reasons No. 5, 6, 7, 8 . . . . .

The Series 5000 makes great separations. Fatty acids. Drugs. Pesticides. Bile acids. Steroids. Sugars. Vitamins. Even amino acids. A n d it makes them with minimum sample d e c o m p o s i t i o n . Even the tough ones. T h e inlet system is all glass to keep metal away from your samples in this h i g h temperature zone. (And we've just i m proved the port for more efficient injection and easier septum replacement.) In fact, s a m p l e degradation is minimized t h r o u g h out the entire system. The system has intake and exhaust dampers for efficient c o o l - d o w n after each t e m p e r a t u r e - p r o g r a m m e d separation. The c o l u m n is re-equilibrated at the initial temperature before the next run can start. Peak retention times are routinely r e p r o d u c i b l e . The electronic temperature programmer gives you oven-temperature reproducibility on a day-to-day basis. The gas flow controllers are insulated and isolated for the best stability available today.

The Series 5000's low noise levels and excellent reproducibility permit smooth interface with all of the popular computers in laboratory use. All system modules, including our new solid-state electrometer, are designed to help achieve this interface. The Series 5000 electrometer has unique temperature-controlled FET's, single-point g r o u n d s on individual PCB's, and independent outputs for recorder, integrator, and computer. That means exceptional baseline stability, very low noise level, short w a r m u p time, and outstanding c o m puter compatibility. Our detectors have extremely low S / N ratios and unexcelled sensitivity. Our dual-zone detector oven has independent temperature controls for the successful use of multiple detectors. A n d it permits servicing of one zone while operating a detector at full sensitivity in the other.

We maintain a complete inventory of chromatography supplies: Columns, phases, supports, syringes, recorders, detectors, hydrogen generator, et al. We also maintain more than 30 sales and service offices in major cities from coast to coast. But we can't tell it all here. The proven accuracy, the proven reliability, the proven productivity. All about all Series 5000 features and what they can mean to y o u . Our new Series 5000 U-column brochure tells and shows it all. Send for it. Then you'll have all the facts. 0.228

Reason No. 2.

Our Model 5141 Automatic Sample Injection System multiplies your productivity. Permits 24-hour unattended operation for either isothermal or temperature-prog r a m m e d analyses. Utilizes metal gauzes (to eliminate solvent peak) or " H o t P o p " PTFE capsules (to prevent sample evaporation prior to injection). Up to 72 solid samples, 35 liquid samples.

The Series 5000 can perform a greater variety of analyses than any other U-column GC. Accessory options such as Radioactivity Monitoring (RAM), Automatic Sample Injection (see below), Automatic Temperature Programming and CoolDown, Pyrolysis (with better r e p r o d u c i bility than any other pyrolyzer), and Cryogenic Programming are all easily i n c o r p o r a t e d in this completely modular system.

Reason No. 4 .

The Series 5 0 0 0 . From Nuclear-Chicago. The Up-and-Coming Chromatography People. NUCLEAR-CHICAGO A SUBSIDIARY OF G. D. S E A R L E & CO. 2000 Nuclear Drive, Des Plaines. Illinois 60018, U.S.A. Donker Curtiusstraat 7, Amsterdam W. The Netherlands

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Circle No.138onReaders' Service Card 28 A

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ANALYTICAL CHEMISTRY, VOL. 4 3 , NO. 3, MARCH 1 9 7 1