Matheson has...
Gases And Equipment For Gas Chromatography We are proud of our expertise in the laboratory — we were manufacturing quality gases and mixtures for more than a decade before GC was introduced. We have maintained our position as leaders ever since.
Calibration Standards
Regulators The M a t h e s o n 3104 r e g u l a t o r is a high purity, t w o - s t a g e r e g u l a t o r with a stainless steel d i a p h r a g m . T w o - s t a g e d e s i g n p r o v i d e s e v e n r e g u l a t i o n r e g a r d l e s s of c y l i n d e r p r e s s u r e c h a n g e s . Stainless steel d i a p h r a g m m i n i m i z e s i n b o a r d leakage of air or water f r o m the a t m o s p h e r e , and d o e s not outgas i m p u r i t i e s into carrier or fuel gas systems. Five m i n u t e h e l i u m leak rate is < 2 χ 1 0 - 9 ces. E x c e l l e n t for a p p l i c a t i o n s involving t r a c e c o m p o n e n t s . CIRCLE 136 O N READER SERVICE CARD
Matheson Primary and Certified Standards are the w o r k h o r s e s of the a n a l y t i c a l l a b o r a t o r y . Primary S t a n d a r d s are m i x e d g r a v i m e t r i c a l l y to the highest a c c u r a c y and p r e c i s i o n on a h i g h l o a d , h i g h s e n s i tivity a n a l y t i c a l b a l a n c e . Primary S t a n d a r d a c c u r a c i e s often e x c e e d the c a p a b i l i t y of your instrumentation. Certified Standards are r e c o m m e n d e d where the c r i t i c a l a c c u r a c y of P r i m a r y S t a n d a r d is n o t r e q u i r e d . Most s t a n d a r d s are t r a c e a b l e to the NBS. CIRCLE 132 O N READER SERVICE CARD
Zero Gases For the c a r r i e r gas, fuel g a s , and o x i d i z e r g a s — a l l r e q u i r e d for f l a m e i o n i z a t i o n and flame p h o t o m e t r i c gas c h r o m a t o g r a p h y — M a t h e s o n offers Ar, He, H 2 , N 2 , 4 0 % H 2 / 6 0 % N 2 , and 4 0 % H 2 / 6 0 % He Zero Gases each having a total h y d r o c a r b o n c o n tent of less than 0.5 p p m (as C H 4 ) . Air, Z e r o Gas is available w i t h h y d r o c a r b o n content < 2 . 0 p p m . CIRCLE 133 O N READER SERVICE CARD
Purifiers HYDROX PURIFIER MODEL 8301
High Purity Carrier Gases M a t h e s o n makes carrier gases a v a i l a b l e in a variety of purity c l a s s i f i c a t i o n s ·— c h o o s e the s p e c i f i c a t i o n s that most nearly meet your r e q u i r e m e n t s . Routine analyses c a n be p e r f o r m e d using H e l i u m , High Purity, 9 9 . 9 9 5 % . For more c r i t i c a l a p p l i c a t i o n s , y o u may c h o o s e Ultra High Purity 9 9 . 9 9 9 % and M a t h e s o n Purity 9 9 . 9 9 9 9 % . For other a p p l i c a t i o n s , A r g o n , H y d r o g e n , and N i t r o g e n are all a v a i l a b l e in a variety of p u r i t i e s . CIRCLE 137 O N READER SERVICE CARD
Filters M a t h e s o n r e c o m m e n d s No. 6164T High Purity Line Filters in all carrier and stream g a s l i n e s . It is s t a i n l e s s s t e e l , h e l i a r c w e l d e d — c a p a b l e of r e m o v i n g p a r t i c l e s 0.3 m i c r o n s or l a r g e r , w i t h a f i l t r a t i o n e f f i c i e n c y of 9 9 . 9 9 9 % . Using these filters m i n i m i z e s b a c k g r o u n d noise, and virtually e l i m i n a t e s the p o s s i b i l i t y of p e r m a n e n t d a m a g e by larger p a r t i c l e s to sensitive valves, meters, a n d other parts of y o u r system.
M a t h e s o n r e c o m m e n d s the use of p u r i fiers in all f l o w systems for the p u r p o s e of k e e p i n g false peaks and b a c k g r o u n d i n t e r f e r e n c e s to a m i n i m u m . T w o t y p e s are a v a i l a b l e : The H y d r o x Purifier is a g e t t e r i n g f u r n a c e c a p a b l e of r e d u c i n g i m p u r i t y levels of 100 p p m w a t e r a n d o x y g e n t o 0.1 p p m e a c h . M o d e l s 450 and 460 Line P u r i f i e r s use i n t e r c h a n g e a b l e c a r t r i d g e s c o n t a i n i n g m o l e c u l a r sieves, c h a r c o a l , a n d s p e c i a l filters. They w i l l r e m o v e o i l , water, f o r e i g n p a r t i c l e s , e t c . T h e 460 w i l l also r e m o v e most heavy h y d r o c a r b o n s . CIRCLE 1 3 4 O N READER SERVICE CARD
CIRCLE 138 O N READER SERVICE CARD
Chart M a t h e s o n offers, free of c h a r g e , a s i x - p a g e b r o c h u r e : " H o w to S u c c e e d at Gas C h r o m a t o g r a p h y . " Inside, a 3-page chart d e t a i l s exactly what y o u require for a high p e r f o r m a n c e GC set-up. I n c l u d e d are s p e c i f i c a t i o n s for carrier gases, r e g u l a tors, filters, t u b i n g , etc., as they apply for the different m e t h o d s of gas c h r o m a t o g r a p h y . S u g g e s t i o n s are also m a d e for gas s a m p l i n g t e c h n i q u e s to m i n i m i z e e r r o r and c o n t a m i n a t i o n . CIRCLE 1 3 5 O N READER SERVICE CARD
M®atheson Lyndhurst, N.J. 07071
East Rutherford, N.J. 07073 M o r r o w , Georgia 30260 Gloucester, Massachusetts 01930 Joliet, Illinois 60430 La Porte, Texas 77571
Cucamonga, California 91730 Newark, California 94560 Whitby, Ontario, Canada LI Ν 5R9 Edmonton, Alberta, Canada T5B 4K6 Β 2431 O e v e l , Belgium
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ANALYTICAL
C H E M I S T R Y , V O L . 4 9 , N O . 7, JUNE
1977 ·
581 A
