New Products
MP-1018 Scanning Monochromator Features digital readout of wave length and slit width. 590 line/mm diffraction grating blazed for 4000Â, has useful range from 2500 to 9000Â. Resolution at least 1Â. Other available gratings permit operation to 15 microns. With standard diffraction grating, the digital wave length counter reads directly in Angstroms. May be operated manually or by a scan drive. 6 switch-selected drive speeds from 50 to 1000A/min. $995.
McKEE-PEDERSEN
INSTRUMENTS
Automatic peak selector accessory for q u a d r u p o l e m a s s s p e c t r o m e t e r s produces a s t e p f u n c t i o n , each c h a n n e l bei n g a d j u s t e d t o give a v o l t a g e level representing a chosen mass number. Parallel o u t p u t s are p r o v i d e d t o m o n i t o r each m a s s on a m u l t i c h a n n e l recorder. Model 2 4 0 , f o u r c h a n n e l s , c o s t s $ 2 2 0 0 ; Model 2 8 0 , eight channels, c o s t s $ 2 9 0 0 . Finnigan C o r p . 4 0 8 - 7 3 2 0940 431 Models 3 7 1 and 3 7 5 are f o u r - c h a n n e l t u b i n g p u m p s ; Model 3 7 1 provides f l o w rates f r o m 2 5 t o 1 0 0 0 m l per hr per c h a n n e l ; by u s i n g a n d m a n i f o l d i n g t h r e e d i f f e r e n t sizes of t u b i n g , 3 3 diff e r e n t r e p r o d u c i b l e f l o w rates f r o m 2 5 t o 4 0 0 0 m l per hr m a y be o b t a i n e d . Model 3 7 5 provides i n f i n i t e l y variable f l o w rates f r o m 1 t o 1 2 0 0 m l per hr per c h a n n e l ( 4 8 0 0 m l per hr by m a n i f o l d i n g t u b i n g w i t h a flow rate range of 2 5 t o 1 w i t h each size t u b i n g . Back pressures up t o 2 5 psi can be h a n d l e d . Model 3 7 5 , $ 4 9 5 ; Model 3 7 1 , $325. Sage I n s t r u m e n t s , Inc. 914-949-4121 432
Two liquid scintillation/programmable data systems p e r f o r m o n - or off-line s t a t i s t i c a l analysis a n d v a r i a b l e q u e n c h d p m computations for samples containing b e t a - e m i t t i n g i s o t o p e s . As m a n y as 12 i n d e p e n d e n t l i q u i d s c i n t i l l a t i o n s y s t e m s or s a m p l e s f r o m 12 users can be h a n d l e d s i m u l t a n e o u s l y . Prices of a basic s y s t e m c o n s i s t i n g of a l i q u i d scintillation unit, i n p u t / o u t p u t teletype device, and s o f t w a r e s t a r t a t a r o u n d $20,000. Nuclear-Chicago. 312-2986600 435 AJ-3 anaerobic and organ culture jar features corrosion-resistant stainless steel c o n s t r u c t i o n , valves in t h e lid ass e m b l y , and built-in steel lid c l a m p s . $100. T o r s i o n Balance Co. 201-4736900 436 OTD-2 ultracentrifuge has a drive syst e m based on an oil t u r b i n e a n d is g u a r a n t e e d f o r p e r f o r m a n c e up t o t w o billion r e v o l u t i o n s . T h e c e n t r i f u g e is rated up t o 6 5 , 0 0 0 r p m and t o 4 2 4 , 0 0 0 χ g w i t h t h e T-865 8 χ 3 6 rotor. Ivan Son/all, Inc. 2 0 3 - 8 4 7 - 2 4 9 1 437
BOX 322 D A N V I L L E , C A L I F . 94526
MP-1033 Double-Beam Photometer This ratio-photometer converts any monochromator into a double-beam spectrophotometer. The unit gives a linear readout in absorbance or percent transmission. The beam splitter, a large sample compartment, and all necessary electronics for UV/visible/near-infrared ratio photometry are provided. All optics, except a single quartz collimating lens, are front-surface mirrors. The wavelength range is 200 to 1200nm, depending on the photomultiplier used. Useful range: 0 to 200°/oT or — 0.3 to + 3 A . Photometric accuracy is ±0.25°/o of full scale and repeatability is ± 0 . 1 % of full scale. $1550.
McKEE-PEDERSEN
INSTRUMENTS BOX 322 D A N V I L L E , CALIF. 94526
Accessory for the Autocytometer II blood cell c o u n t e r provides a s i m u l t a n e o u s h e m o g l o b i n d e t e r m i n a t i o n w i t h each w h i t e cell c o u n t . The accessory has an out s t a n d i n g c o n c e n t r a t i o n range of 2 to 25 g r a m s per 1 0 0 m l of w h o l e b l o o d . Read o u t s are t o t h e nearest 0.1 g r a m w i t h r e p e a t a b i l i t y of ± 0 . 2 g r a m . $ 1 2 0 0 . Fisher S c i e n t i f i c Co. 4 1 2 - 3 9 1 - 1 3 3 0 433
IL 1 5 4 automatic sampler system handles rapidly a n d w i t h precision large b a t c h e s of s a m p l e s f o r a t o m i c absorp t i o n / e m i s s i o n analysis. C o n s i s t i n g of a basic s a m p l e p r e s e n t a t i o n u n i t plus a dual-channel control module and a d i g i t a l printer, t h e s y s t e m can handle lots of 1 0 0 , 2 0 0 , or 4 0 0 s a m p l e s . $7700. Instrumentation Laboratory, Inc. 6 1 7 - 8 6 1 - 0 7 1 0 434
Circle No. 124 on Readers' Service Card
124 A ·
ANALYTICAL CHEMISTRY, VOL. 43, NO. 4, APRIL 1971
Model 250 Insonator high-intensity ultrasonic energy source has been specially d e s i g n e d f o r u l t r a s o n i c d i s i n t e g r a t i o n a n d h o m o g e n i z i n g in c h e m i cal, b i o l o g i c a l , a n d m e d i c a l r e s e a r c h . The c o m p a n y also m a k e s M o d e l s 5 0 0 and 1 0 0 0 I n s o n a t o r s . Prices: Model 2 5 0 , $ 5 9 5 ; Model 5 0 0 , $ 7 5 0 ; a n d Model 1000, $ 9 5 0 . U l t r a s o n i c S y s t e m s , Inc. 201-265-8626 438
