GILFORD UV & VIS SPECTROPHOTOMETERS
OVER 300 READINGS PER HOUR with
the
model
2443
RAPID
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. . . . FLEXIBILITY TO MATCH YOUR GROWING NEEDS .
SAMPLER
The G i l f o r d vacuum operated rapid sampling system requires samples of o n l y 0.5 m l a n d can process over 3 0 0 per h o u r . T h e c u v e t t e r e m a i n s in t h e m e a s u r i n g b e a m f o r b o t h f i l l i n g and c l e a n i n g , m i n i m i z i n g s a m p l e h a n d l i n g and c u v e t t e breakage. C o n s t r u c t i o n of c h e m i c a l l y i n e r t K e l - F p e r m i t s t h e use of a w i d e v a r i e t y of reagents. W i t h t h i s increased p r o d u c t i v i t y available, t r a n s c r i p t i o n t i m e b e c o m e s a l i m i t i n g f a c t o r . A p e r m a n e n t r e c o r d of absorbance or c o n c e n t r a t i o n can be p r i n t e d o u t a u t o m a t i cally b y a d d i n g t h e G i l f o r d M o d e l 4 1 0 A b s o r b a n c e / C o n c e n t r a t i o n M e t e r and M o d e l 4 0 0 6 Data L i s t e r .
UV or VIS . . . STAINED OR UNSTAINED with the model
2410 LINEAR
TRANSPORT
S e p a r a t i o n of r i b o s o m a l R N A b y gel e l e c t r o p h o r e s i s has made a p o w e r f u l t e c h n i q u e available. T h e d e v e l o p m e n t of the G i l f o r d Model 2 4 1 0 Linear Transport permits y o u to scan such gels in t h e u l t r a v i o l e t d i r e c t l y . Y o u get increased accuracy w i t h h i g h r e s o l u t i o n . T h e t i m e c o n s u m i n g s t a i n i n g process is e l i m i n a t e d . U n s t a i n e d a n d s t a i n e d m a t e r i a l s m a y n o w be a n a l y z e d , as b o t h u l t r a v i o l e t a n d visible e n e r g y can be u s e d . W i t h t h e M o d e l 2 4 1 0 L i n e a r T r a n s p o r t y o u w i l l be able t o h a n d l e m a t e r i a l s such as p o l y a c r y l a m i d e gel c y c l i n d e r s a n d slabs, cellulose acetate m e m b r a n e s , and p h o t o g r a p h i c e m u l s i o n s .
RECORD 4 INDIVIDUAL REACTIONS WITH 12 POINTS PER REACTION EVERY 3 MINUTES . . . with the model 2441 AUTOMATIC POSITIONER Y o u r spectrophotometer equipped w i t h the Gilford automatic sample handling system w i l l p r o d u c e m o r e data than b e f o r e , w h i l e m a i n t a i n i n g t h e precise a l i g n m e n t d e m a n d e d w h e n using m i c r o c u v e t t e s . In t h e a u t o m a t i c m o d e u p t o 16 p l o t p o i n t s , f o u r per i n d i v i d u a l c u v e t t e , can be r e c o r d e d in one m i n u t e . The exclusive offset feature permits individual baseline a d j u s t m e n t f o r each c u v e t t e p o s i t i o n .
gilford® Instrument Laboratories Inc. Oberlin, Ohio 44074
All G i l f o r d U V / V I S Spectrophotometers and most quality m o n o c h r o m a t o r s are readily adapted to use these accessories. Find out how easily and inexpensively these devices can be adapted to your present system. Call 2 1 6 / 7 7 4 - 1 0 4 1 n o w , or w r i t e for Bulletin AC-29.
Pittsburgh Conference—Spaces 148 & 149 Circle No. 56 on Readers' Service Card 128 A
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ANALYTICAL CHEMISTRY
