Pierce Regroovenators Keep Swagelok® Threads Smooth and Free Running TM
NEW CHEMICALS Two d e u t e r a t e d n m r shift reagents, E u ( f o d ) 3 - d 3 0 a n d Pr(fod) 3 -d 3 0 , t r i s ( 1 , 1 , 1 , 2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedione) europium(lll) and praseodymium(lll) a r e available. These com p o u n d s a r e vastly superior t o t h e " t h d " a n a l o g s with r e s p e c t t o both solubility a n d Lewis acidity. T h e a d v a n t a g e of t h e s e d e u t e r a t e d c o m p o u n d s is t h a t t h e y e l i m i n a t e interference c a u s e d by p r o t o n s p r e s e n t in t h e u n d e u t e r a t e d ligands. Norell C h e m i c a l C o . 2 0 1 398-1324 501 Aquascint-I is a universal scintillation c o u n t i n g c o c k t a i l t h a t will a c c o m m o d a t e u p t o a 2 0 % v o l u m e of a q u e o u s s o l u tion. T h e d i o x a n e b a s e solution is ideally suited for m o s t a q u e o u s a n d organic solvent soluble compounds. Aquascint-ll offers a 4 0 - 7 0 % g r e a t e r scintillation c o u n t i n g efficiency than t h e conventional Bray's solution. It is specially f o r m u l a t e d for a q u e o u s solu t i o n s c o n t a i n i n g c a r b o n - 1 4 a n d / o r hydrogen-3. A q u a s c i n t - l l is m a d e w i t h u l t r a p u r e 1,4 d i o x a n e a s a b a s e . It will a c c o m m o d a t e u p t o 3 m l of w a t e r p e r 1 5 m l of t o t a l c o c k t a i l v o l u m e . ICN C h e m i c a l a n d R a d i o i s o t o p e Div. 7 1 4 833-2500 502 A c o m p l e t e l i n e of s t a n d a r d s f o r t r a c e metal a n a l y s e s by a t o m i c a b s o r p t i o n , atomic fluorescence, and emission s p e c t r o s c o p y is a v a i l a b l e in 1 0 0 - a n d 500-ml quantities. All h a v e c o n c e n t r a t i o n s of 1 0 0 0 p p m in a q u e o u s s o l u tion. O t h e r m a t e r i a l s a r e o f f e r e d in 5- a n d 2 5 - g r a m q u a n t i t i e s a s a b a s i s for p r e p a r i n g s t o c k s o l u t i o n s . Alfa Products. 617-922-0768 503
Just run a R E G R O O V E N A T O R d o w n t h a t fitting a n d realign t h o s e b a l k y t h r e a d s . E x c e l l e n t for close quar ters, y o u only n e e d % inch clearance from center of fitting! Knurled for positive grip.
REGROOVENATORS
a r e s u p p l i e d in
four
d i e sizes t o fit S w a g e l o k
100,
2 0 0 , 3 0 0 a n d 4 0 0 fittings
1/16",
(for
fits
REGROOVENATOR
Swagelok
series
L i m i t e d d e v e l o p m e n t a l q u a n t i t i e s of c a l i f o r n i u m - 2 5 2 in s o l i d w i r e f o r m a r e available. This intense neutron emit t i n g i s o t o p e in w i r e f o r m s h o u l d s i m p l i f y encapsulation. T h e p r i c e of californ i u m - 2 5 2 in w i r e f o r m is $ 1 0 / / x g of c a l ifornium-252 a n d a $ 1 6 0 0 handling packaging charge F.O.B., Savannah River Plant. For information and
REGROOVENATOR Ί 0 0 '
$12/ea
11195
REGROOVENATOR'200'
$12/ea
11199
REGROOVENATOR ' 3 0 0 ' $12/ea
11200
REGROOVENATOR ' 4 0 0 ' $12/ea
R e g r o o v e n a t o r is a t r a d e m a r k Chemical C o m p a n y .
100, etc. of
PIERCE CHEMICAL COMPANY
Pierce
P.O. B o x 117 Rockford, Illinois 61105 U . S . A . PHONE 8 1 S / 9 6 B - 0 7 4 7
TWX 9 1 0 - 6 3 1 - 3 4 1 9
CIRCLE 152 ON READER SERVICE CARD
rneaaure
L^awrieâ
QUICKLY · ACCURATELY · CONVENIENTLY with a fully automatic PARR® Adiabatic Calorimeter . . . and a PARR® Digital Thermometer
A P o l a r o q u a l i t y l i n e of h i g h l y p u r i f i e d s a l t s f o r u s e in m a k i n g p h y s i c o - c h e m i cal m e a s u r e m e n t s is a v a i l a b l e . To a c h i e v e t h i s h i g h d e g r e e of p u r i t y , a m o d i f i c a t i o n of t h e L a i t i n e n m e t h o d is used. MC&B M a n u f a c t u r i n g C h e m i s t s . 513-631-0445 504 Ore, b e l i e v e d t o c o n t a i n m o r e t h a n 5 % t e c h n e t i u m , is available a s l u m p s or c o a r s e p o w d e r p a c k e d in 8 - o z g l a s s j a r s . 2 0 0 g r a m s f o r $ 2 0 . C h a r l e s W. Turner, 6 3 2 3 5 t h Ave., N.E., Seattle, Wash. 9 8 1 1 5
11190
1/8", 3 / 1 6 " and 1/4" tubing,
respectively). '100'
Series
Parr now offers a completely new oxygen bomb calorimeter for measuring the cal orific or Btu value of coal, oil, jet fuels, foods and other solid or liquid samples. A new solid-state automatic temperature controller eliminates all time consuming temperature adjustments, doubles the output and improves the repeatability in calorimetric tests.
A new Parr Digital Thermometer and Printer add speed, convenience and accuracy to any bomb calorimeter by displaying temperatures in bright, easily seen numbers readable to .001° C, and producing a printed record of all read ings taken during a calorific test. Ask for our latest calorimeter catalog.
PARR INSTRUMENT
Parr ®
2 1 1 Fifty-Third St.
COMPANY M o l i n e , III. 6 1 2 6 5
Telephone ( 3 0 9 ) 762-7716
CIRCLE 150 ON READER SERVICE CARD ANALYTICAL C H E M I S T R Y , VOL. 4 4 , N O . 2 , F E B R U A R Y 1 9 7 2
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151A
