Karl Fischer Titration | Titration | Ion Chromatography | Stripping Voltammetry

Theory of Ion Chromatography from Metrohm

Which Ion Chromatography column for which application?

Ion   Application Order No. Separating column
 
Anions
(inorganic)		 - high concentrations
- simple setup
- HBO32-
- H2SiO42-
- no HPO42- => without chemical suppression 		- rapid separation
- simple separating problems
- simple matrices
- no F-		 xx
6.1006.020
6.1006.040 		IC anion columns Metrosep Dual 1
150 mm
70 mm
 
- difficult separating problems
- difficult matrices
- F-		 6.1006.100 IC anion column Metrosep Dual 2
 
- Cl-, N32-, SO42-
- difficult matrices, e.g. dyes
- HBO32-, H2SiO42-		 Xx
6.1005.000
6.1005.010		 Hamilton PRP-X-100 anion columns
125 mm
250 mm
 
- F-, acetate
- difficult matrices
- special applications, e.g. BF4-		 6.1009.000 IC anion column Super-Sep
- whole concentration range
- HPO42- => with chemical suppression		 - favorably priced
- simple separating problems
- no NO2-
- rapid separation (with 70 mm)
- F-, Cl-, Br-, I- (with 70 mm)
- Cr(VI) (CrO42-)		 Xx
6.1006.020
6.1006.040		 IC anion columns Metrosep Dual 1
70 mm
150 mm
 
- standard anions
- F-, acetate, formate, Cl-
- SO32-, SO42-
- simple matrices
- ClO2-, ClO3-, ClO4-
- special separating problems		 6.1006.100 IC anion column Metrosep Dual 2
 
- large concentration differences
- high ionic strength
- ClO2-, ClO3-, ClO4-		 6.1005.300 IC anion column Metrosep A Supp 1
   
- standard anions
- purely aqueous matrices		 6.1005.310 IC anion column Metrosep A Supp 2
   
- SCN-, S2O32-, SO32-, SO42-
- organic matrices		 6.1005.320 IC anion column Metrosep A Supp 3
   
- standard anions
- water analysis
- method development
- difficult matrices
- critical samples		 6.1006.430 IC anion column Metrosep A Supp 4
   
- standard anions
- F-, Cl-, Br-, I-
- ClO2-, ClO3-, ClO4-, BrO3-
- ClO4- at high ionic strength
- BrO3- at high ionic strength
- Cr(VI) (CrO42-)
- I- (with 100 mm)
- method development
- universal use
- difficult matrices
- difficult separating problems
- rapid separation (with 100 mm)		 Xx
6.1006.510
6.1006.520
6.1006.530		 IC anion columns
Metrosep A Supp 5
100 mm
150 mm
250 mm
   
- rapid separation 6.1005.100 IC anion column Phenomenex Star Ion A300
   
- BrO3- at high ionic strength 6.1005.110 IC anion column Phenomenex Star Ion A300 HC
     
Anions
(organic)		   - organic acids: citrate, tartrate, malate, ascorbate, succinate, HCOO-, CH3-COO-, etc.
- difficult matrices
- difficult separating problems		 6.1005.200 IC exclusion column Metrosep Organic Acids
   
- glycolic acid, monochloroacetic acid
- simple matrices
- simple separating problems
- formate determination		 6.1005.300 IC exclusion column Hamilton PRP-X300
       
Anions
(carbohydrates)		   - monosaccharides
- disaccharides
- sugar alcohols
- simple separating problems
- rapid separation		 6.1013.010 IC corbohydrate column Metrosep Carb 1 - 150
   
- monosaccharides
- disaccharides
- sugar alcohols
- difficult separating problems
- difficult matrices		 6.1013.000 IC corbohydrate column Metrosep Carb 1 - 250
       
Anions
(oxidizable)		 without chemical suppression, with electrochemical detection (ELCD) - CN- (ELCD)
- S2- (ELCD) 		6.1005.300 IC anion column
Metrosep A Supp 1
     
without chemical suppression, with electrochemical detection (ELCD) and conductivity detection (COND) - ClO2-, NO2-, S2O32-, SCN-, I- (ELCD); standard anions (Cond) 6.1009.000 IC anion column Super-Sep
     
  - Br-, I- (ELCD); standard anions (Cond) 6.1006.100 IC anion column Metrosep Dual 2
     
with chemical suppression,
with ELCD and Cond		 - ClO2-, NO2-, (ELCD); standard anions (Cond)
- S2O32-, SCN-, I- (ELCD); standard anions (Cond)		 6.1006.510 IC anion column
Metrosep A Supp 5 (100 mm)
       
Cations                       - special applications 6.1010.100 IC cation column Metrosep C 1
     
  - Li+, Na+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, NH4+
- lipophilic amines with short retention times
- rapid separations		 6.1010.210 IC cation column Metrosep C 2 - 100
     
  - standard column
- Li+, Na+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, NH4+
- successor to IC cation column Metrosep Cation 1-2 (6.1010.000)		 6.1010.220 IC cation column Metrosep C 2 - 150
     
  - Li+, Na+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, NH4+, Co2+, Ni2+, Zn2+, Cd2+, Pb2+, amines
- NH4+, monoethanolamine
- very good Na+ / NH4+ separation
- NH4+, (CH3)NH3+, (CH3)2NH2+, (CH3)3NH+, (CH3)4N+ as well as the corresponding ethyl ammonium ions
- difficult separating problems
- large concentration differences		 6.1010.230 IC cation column Metrosep C 2- 250
     
  - Mg2+, Ca2+, Sr2+, Ba2+, Co2+, Ni2+, Zn2+, Cd2+, Mn2+, Fe2+
- Mg2+, Ca2+, in the presence of large amounts of Na2+		 6.1007.000 IC cation column Nucleosil %sA
     
  - Transition metals, U and Pu   Transition metals as well as uranium and plutonium can be reliably determined down to the ultratrace range with voltammetry and polarography.