MATHESON SUPPLIES SPAN GASES FOR MOST TOXIC VAPORS... AND THE EQUIPMENT TO MAKE IT WORK T o t e s t or m o n i t o r f o r t o x i c gases a n d v a p o r s is a vital a n d d i f f i c u l t job, w h a t e v e r t h e i n s t r u m e n t t h a t y o u use. T h e a c c u r a c y o f your m e a s u r e m e n t s is critical . . . health a n d life itself are o f t e n in t h e balance. T o ensure this vital a c c u r a c y y o u need a suitable zero gas a n d a n a c c u r a t e s p a n gas t o calibrate your instrument. M a t h e s o n supplies b o t h zero gases a n d t h e w i d e s t v a r i e t y o f s p a n gases. W e o f f e r b o t h Primary and Certified Standards, or will c u s t o m blend t o your requirements. B u t , an a c c u r a t e m i x t u r e a n d high quality zero g a s are not enough. W i t h o u t t h e proper t r a nsf er s y s t e m t o c a r r y t h e gas f r o m t h e cylinder t o y o u r i n s t r u m e n t you jeopardize t h e value o f y o u r w o r k . A g o o d regulator like M a t h e s o n ' s 3 1 0 4 or 3 8 0 0 — c o n s t a n t pres sure, metal d i a p h r a g m — c o m bined w i t h t h e proper clean metal t u b i n g is a m u s t . M o r e i m p o r t a n t , M a t h e s o n sup plies experience t h a t you can d r a w upon t o keep your i n s t r u m e n t w o r k i n g a t peak e f f i c i e n c y , or t o help y o u select t h e proper equip ment for a new instrument. T o i m p r o v e your operation send f o r "Gas M i x t u r e s , F a c t s a n d Fables." W e d i s c u s s all this in detail a n d m o r e .
MATHESON
Lyndhurst, N| 07071 Plants and East Rutherford, N) 07073 Morrow, Georgia 30260 Gloucester, Massachusetts 01930 loliet, Illinois 60430 La Porte, Texas 77571 ®
Offices Cucamonga, California 91730 Newark, California 94560 Whitby, Ontario, Canada LIN 5R9 Edmonton, Alberta, Canada T5B 4K6 Β 2431 Oevel, Belgium
CIRCLE 141 ON READER SERVICE CARD A N A L Y T I C A L CHEMISTRY, V O L . 4 8 , NO. 4 , APRIL
1976
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353 A
