New Products
You get superior performance with the Carborundum/Tem-Pres Thermal Analysis System
Model 200 uv detector m o n i t o r s s i m u l t a n e o u s l y a n d differentially at 254 a n d / o r 280 n m . Linear r e s p o n s e a t 254 a n d 280 n m is six binary s t e p s , A = 0.06 t o 2.13 nonlinear response t o A = 4.26. M i n i m u m d e t e c t a b l e a b s o r b a n c e , A = 0.0001 T h i s d o u b l e - b e a m u n i t is s u i t a b l e as s d e t e c t o r in liquid c h r o m a t o g r a p h y , d e n sity g r a d i e n t c e n t r i f u g a t i o n , e t c . $2439 Pharmacia Fine C h e m i c a l s , Inc. 201-4691222 423
CONTROL CONSOLE
Precise a u t o m a t i c p r o g r a m m i n g , true linear c o n t r o l a n d digital c a p a b i l i t i e s a r e features of this m o d e r n d e s i g n . T h e TA-700 c o n t r o l c o n s o l e is interfaced to a c c e p t TEM-PRES Differential T h e r m a l Analysis, T h e r m o g r a v i m e t r i c Analysis, T h e r m a l Dilatometry, a n d High Pressure DTA m o d u l e s .
Portable gas chromatograph M o d e l 7500 weighs 26 l b , a n d its o u t p u t is d e s i g n e d for a 2-10 m V portable b a t t e r y - o p e r a t e d p o t e n t i o m e t r i c recorder. T h e i n s t r u m e n t can provide u p t o 44 hr o f c o n t i n u o u s o p e r a t i o n w i t h t h e use of t h e l e c t u r e b o t t l e ; d e t e c t i o n is by t h e r m a l c o n d u c tivity. $875. Carle I n s t r u m e n t s , I n c . 714-879-9900 424 Laser Z e e m e t e r is an e l e c t r o p h o r e s i s i n s t r u m e n t for zeta p o t e n t i a l d e t e r m i n a t i o n of a q u e o u s colloids. Features inc l u d e a single digital d i s p l a y w i t h r e a d o u t of zeta p o t e n t i a l , specific c o n d u c t a n c e , t e m p e r a t u r e , a n d a p p l i e d cell v o l t a g e ; laser light source; c o m p u t e r a v e r a g i n g w h i c h results in g o o d reproducibility; a n d s i m p l e o p e r a t i n g p r o c e d u r e . $4950. P e n Kern Co. 914-271-5447 425 T h e r m o s t a t i c a l l y c o n t r o l l e d u n i t s for b o t h o p e n b a t h a n d external circulator capabilities provide c o n s t a n t t e m p e r a t u r e water b a t h s f r o m a m b i e n t t o +200°C. T h e range c a n be e x t e n d e d to —80°C w i t h Heto's u l t r a c r y o t h e r m . Control accuracies range f r o m ± 0 . 1 t o ±0.0005°C. M o d e l T6TB w i t h 22-1. c a p a c i t y sells for $348. T h e L o n d o n Co. 216-871-8900 426
Write or phone for details to: TEM-PRES RESEARCH DIVISION THE C A R B O R U N D U M C O M P A N Y 1401 South A t h e r t o n Street State College, Pennsylvania 16801 P h o n e : 814 237-7631
CARBORUNDUM
CIRCLE 34 ON READER SERVICE CARD
The preferred column tubing NOW A V A I L A B L E FOR IMMEDIATE SHIPMENT
HANDY & HARMAN TUBE CO.
CHROMAT I.D. T.M.
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Now! Chromât I.D. Tubing is available in pre-packaged boxes for immediate shipment. Available on spools in lengths f r o m 100' to 1000' in sizes . 0 6 2 " O.D. χ . 0 1 0 " , . 0 2 0 " , . 0 3 0 " I.D. Other sizes up t o . 6 2 5 " O.D. also available.
A Handy and Harman Company Dc a m p l i f i e r 6599 a m p l i f i e s s m a l l signals f r o m t h e r m o c o u p l e s or o t h e r t r a n s d u c e r s up t o 2000 t i m e s . Seven sensitivity sett i n g s c a n be switch-selected f r o m 20 t o 1000 M V f s d . £375. S t a n t o n Redcroft, C o p p e r Mill Lane, L o n d o n SW17, England
DTA
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HANDY & HARMAN TUBE COMPANY
Norristown, Pa. 19404 Telephone (215)275-2734 O u t s i d e U . S . A . : Handy & Harman Tube Co. Export Dept. 1010 Schaff BIdg. Phila. Pa. 19102. Cable-Machinex. Telex 845-388 CIRCLE 96 ON READER SERVICE CARD A N A L Y T I C A L CHEMISTRY, VOL. 4 4 , NO. 1 1 , SEPTEMBER 1 9 7 2
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