The
FROM
Silver Billet Electrode is Obsolete!
NEW SPECTROPHOTOMETER
T h e Silver Billet Electrode was used t o m e a s u r e c h l o r i d e i o n . B u t i t h a d t o b e a n o d i z e d be f o r e use, a n d i t d e v e l o p e d r e d o x p o t e n tial errors w h e n o x i d i z i n g agents were pre sent — f o r e x a m p l e , f e r r i c , c u p r i c , c h r o m a t e , or permanganate ions. T h e O R I O N S o l i d S t a t e C h l o r i d e E l e c t r o d e is a l w a y s r e a d y t o use, a n d is i m m u n e t o r e d o x p o t e n t i a l e r r o r s . I t makes possible t h e s i m p l e , d i r e c t measurement o f c h l o r i d e i o n i n f o o d s , g r o u n d w a t e r s , soils, p l a n t e f f l u e n t s , a n d h u n d r e d s o f o t h e r t y p e s of samples. Measurements can be made d o w n t o a f e w p a r t s per m i l l i o n , regardless o f c o l o r a n d t u r b i d i t y . A n o t h e r e x a m ple of the n e w t e c h n o l o g y f o r chemical measurement — f r o m O R I O N . O r i o n R e s e a r c h I n c o r p o r a t e d 11 B l a c k s t o n e S t r e e t
COLEMAN...
C a m b r i d g e , Mass. 0 2 1 3 9
Circle No. 55 on Readers' Service Card
Now! A high resolution instrument at moderate cost
FIRST CLASS Permit No. 1538 New York, Ν. Υ.
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POSTAGE WILL BE PAID BY
ANALYTICAL CHEMISTRY PUBLISHER'S DATA CENTER, INC. 132 WEST 31ST STREET NEW YORK, Ν. Υ. Ε
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