2 :XYZ-2 213, I = n FCV (, F :, C, V : ), H + Na + ( ),H +, 2,,, ( ) ( ) :, 1 ;, ( Fig 1 Diagram of the electrochemical ), H +, suppressor 1) Suppress

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1 EL ECTROCHEMISTR Y Vol 5 No 2 May 1999 XYZ-2 3 ( ), %, 10 %, (c v < 2),, [1 ] 1986 ( ES) ( : ) [2 3,, ] [4 ], :,, 1986 XYZ-1 ( ),,, XYZ-1 :1,, 2,,,, XYZ-2, 15 5, ABS,, XYZ-1 1 ( ES) ES ( ) 1, mol/ L ( Na 2 CO 3 ) ( NaCl), H + Na +,

2 2 :XYZ-2 213, I = n FCV (, F :, C, V : ), H + Na + ( ),H +, 2,,, ( ) ( ) :, 1 ;, ( Fig 1 Diagram of the electrochemical ), H +, suppressor 1) Suppression compartment ;, 2 ) Exchange membrane ; 3 ), Anode; 4) cathode ; 5) analyte, compartment ; 6 ) catholyte compartment 0 15 mm, XYZ21 ( 2 a),,,,,,xyz22,, 100 %, 0 15 mm ES ( 2 2) 1 ES 1, (A),,, ES (C),, ( ),, (B) ES : (1) Na +, (2) H +,,,,,

214 1999 2 SEM (a b ) Fig 2 SEM photoes of packings(a Ground resins b Globular resins) 1 ES Tab 1 The effects of sulfonated depth of resins in ES / ma / h / V 8 60 40 0 5 A 10 1 B 4 5 8 C 3 2 0 5 A 7

3 SEM (a b ) Fig 2 SEM photoes of packings(a Ground resins b Globular resins) 1 ES Tab 1 The effects of sulfonated depth of resins in ES / ma / h / V A 10 1 B C A 7 1 B C 3, 6 : mol/ L NaHCO mol/ L Na 2 CO 3, 2 ml/ min 3, YSA4, AR :3 2 mmol/ L Na 2 CO mmol/ L NaHCO 3, : mol/ L NaF, mol/ L NaCl, mmol/ L NaBr, mol/ L Na 3 PO 4, mol/ L Na 2 SO 4, mol/ L NaNO 3, mol/ L NaNO 3 (WFX-1B) ES Na mol/ L mol/ L %( XYZ %),

4 2 :XYZ ( 0 15 mm) 1 # 2 # 3 # 4 #, 3 (1 # 3 # A4-8 # ES :1 #, separator column :A428 # ; ES :3 #, separator column :A428 # ; ES :2 #, separator column :A4210 # ; ES :4 #, separator column :A4210 # 3 ES Fig 3 Ion chromatogram of seven anions using the ES 1 #,2 # packing ground resins ; 3 #,4 # packing globular resins

5 ,2 # 4 # A4-10 # ) ( ) ES(3 # 4 # ) ES(1 # 2 # ) 10 % 3 # 4 # 6 ( NO - 2 ) 2 2 NO Tab 2 The reproducibility for peak heights and retention times of NO (c v) / cm # / s / cm # / s DION EX mmol/ L NaCO mmol/ L NaHCO 3, 0 5 ml/ min, S, ES 1 5 ml/ min S, ES ES ( ), ( ), XYZ-2 4 XYZ-2 ( ES) ES, XYZ-1,,, ABS,,

6 2 :XYZ XYZ-2 High- Perf ormance Electrochemical Suppressor f or Ion Chromatography Hu Weiling Lin Huashui 3 ( Dept of Chem Xiam an U niv, Xiam an ) Abstract The packings of electrochemical suppressor on ion chromatography were studied,it was found that the best packing is the appropriately sulfonate globular resins uniform in size Using t hese resins,suppression efficiency was improved to %,and sensitivity improves about 10 %,the reproducibilities of both the height of ion peaks and retention time are very good (c v < 2) Key words Ion chromatograp hy,conduct,suppressor Reference s 1 Z W Tian,R Z Hu, H S Lin,J T Wu High-performance electrochemical suppressor for ion chromatography J Chromatograph,1988,439 : Stevens T S,Davis J C,Small H Hollow Fiber ion-exchange suppressor for ion chromatography Anal Chem, 1981,53 : Hanaoka Y,Murayama T, Muramoto S,Matsura T,Hanba A Ion chromatography with an ion-exchange mem2 brane suppressor Chromatogr,1982,239 : Franklin G O Development and applictions of ion chromategraphy Am Lab ( Fairfield,conn ),1985,17 :665

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