EPA, ASTM, and Standard Methods Approved

i " 1 " * ^

t i *f ' , I ^ - i . ^ ^ .

F (1.5 ppm) α-Hydroxybutyrate Acetate Glycolate Butyrate Gluconate 23

7. a-Hydroxyvalerate 8. Formate (5 ppm) 9. Valerate

10. Pyruvate 1 1 . Monochloroacetate 12. B r O s -

13. C I - ( 3 ppm) 14. Galacturonate 15. N O z - ( 5 p p m ) 16. Glucuronate 17. Dichloroacetate 18. Trif luoroacetate

19. HPCb2" 20. Se032" 2 1 . B r ~ 22. N O s " 23. SÛ42" 24. Oxalate 25. Se042~ 26. a-Ketoglutarate 27. Fumarate 28. Phthalate 29. Oxalacetate 30. PO43

31.As04 3 " 32. CrU42

33. Citrate 34. Isocitrate 35. cis-Aconitate 36. trans-Aconitate

All anions 10 ppm unless noted

Gradient elution of anions. D ionex s e p a r a t i o n a n d de tec ­t i o n m e t h o d s h a v e d r a m a t i c a l l y i nc reased t h e reso l v i ng p o w e r of Ion C h r o m a t o g r a p h y . In t h i s e x a m p l e , an i ons w i t h vas t ly d i f f e ren t r e t e n t i o n cha rac te r i s t i c s w e r e de te r ­m i n e d in a s ing le r u n .

P P ™ 1.LÎ+ 2. Na +

NH.+ K+ Morpholine Cyclohexylamine IVlg2+

Sr2+

.5 2 3 3

30 10

1 2

10

Gradient elution of cations. For t h e f i r s t t i m e , m o n o -a n d d i v a l e n t m e t a l s a n d o rgan i c ca t i ons can be d e t e r ­m i n e d in a s ing le ana lys is . Th i s has been m a d e poss ib le by D ionex s u p p r e s s e d c o n d u c t i v i t y d e t e c t i o n a n d t h e n e w Dionex q u a r t e r n a r y g r a d i e n t c h r o m a t o g r a p h y p u m p .

WATER ANALYSIS Sample:

Industry:

Analytes:

Drinking, waste, ground, and rain water; soil and plant extracts

Environmental, agriculture, chemical

Inorganic ions, metals, and organics

Current method: Ion selective electrode, wet chemistry, t itration, AA

Problem: Current methods lack sensi­tivity and only determine one analy teatat ime

Solution: Dionex Ion Chromatography

No other Ion Chromatograph offers these advantages: Gradient elution, EPA, ASTM, and Standard Methods equivalency. And the capability to quickly determine trace anions or cations in aqueous samples, with little or no pretreatment.

Plus, with Dionex, you get the versatility you need to solve Ion Chromatography and HPLC analysis problems including carbamates, PAH's, organic acids, surfactants, sulfonates, transition metals, and amines — all with a single system. And at a reasonable cost.

If you're looking for a better solution, call us at (408) 737-0700. Chances are, we already have the answer.

DIONEX A BETTER SOLUTION

Dionex Corporation, P.O. Box 3603, Sunnyvale, CA 94088-3603. (408) 737-0700.

Canada Dionex Canada, Ltd., (416) 620-0077 England Dionex (UK) Ltd., (0252) 541346 West Germany Dionex G m b H , (06150) 3047 France Semsa S.A.. (1) 4621-6666 Italy Dionex S.r.l., (06) 5349735

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