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Ion Selective
Electrode
Sensor
type
Limits, ppm Concentration
range, molar
pH range Main
Interferences
Standard (Calibration) solutions Ionic Strength Adjusting Buffers ( ISA ) Type of Ref.
Electrode
Filling solution for Double-Junction Ref. Electrodes
Description Cat. # Description Cat. # Description Cat. #
Ammonia (NH3) Gas sensing 17,000 to 0.02 1 to 10-6 11 to 13 Hydrazine 1000 ppm as N 302/1000s 10 M NaOH NaOH/ISA *    
Ammonium (NH4+) PVC "dry" contact 9,000 to 0.9 0.5 to 5x10-5 0 to 8.5 K+ 1000 ppm as NH4+ 051/1000s 5 M NaCl NaCl/ISA Double-Junct. .1 M NaCl NaCl/DJ
Barium (Ba+2) PVC "dry" contact 13,700 to 1.4 0.1 to 10-5 3 to 10 K+ Na+ Sr+2 1000 ppm as Ba+2 081/1000s 4 M KCl KCl/ISA Double-Junct. 1 M NH4NO3 NHNO/DJ
Bromide (Br-) Solid State 81,000 to 0.4 1 to 5x10-5 1 to 12 I- S-2 CN- 1000 ppm as Br- 271/1000s 5 M KNO3 KNO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Cadmium (Cd+2) Solid State 11,200 to 0.1 0.1 to 10-6 3 to 7 Cu+2 Hg+2 Ag+ 1000 ppm as Cd+2 241/1000s 5 M KNO3 KNO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Calcium (Ca+2) PVC "dry" contact 4,010 to 0.02 0.1 to 5x10-6 3.5 to 11 Ba+2 Al+3 Sr+2 1000 ppm as Ca+2 041/1000s 4 M KCl KCl/ISA Single Junct. ***  
Carbonate (CO3-2) PVC "dry" contact 80 to 0.008 10-3 to 10-7 6.6 to 9.6 OAc- SCN- 100 ppm as CO3-2 091/100s **   Single Junct. ***  
Chloride (Cl-) Solid State 35,500 to 2 1 to 5x10-5 1 to 12 I- Br- CN- S-2 1000 ppm as Cl- 261/1000s 5 M KNO3 KNO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Chloride (Cl-) PVC "dry" contact 35,500 to 0.2 1 to 5x 10-6 2 to 11 ClO4- NO3- OH- SO4- 1000 ppm as Cl- 261/1000s *   Double-Junct. .1 M KCl KCl/DJ
Copper (Cu+2) Solid State 64,000 to 0.006 1 to 10-7 2 to 7 Hg+2 Ag+ S-2 1000 ppm as Cu+2 227/1000s 5 M KNO3 KNO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Cyanide (CN-) Solid State 260 to 0.03 10-2 to 10-6 11 to 13 Br- I- S-2 **   10 M NaOH NaOH/ISA Single-Junct. ***  
Fluoride (F-) Solid State 1,900 to 0.02 0.1 to 10-6 4 to 8 OH- 1000 ppm as F- 221/1000s TISAB 221/1ISA Single-Junct. *  
Fluoroborate (BF4-) PVC "dry" contact 86,800 to 0.7 1 to 8x10-6 2 to 11 Cl- OAc- H2PO4- HCO3- 1000 ppm as BF4- 028/1000s 2 M (NH4)2SO4 NHSO/ISA Double-Junct. .1M (NH4)2SO4 NHSO/DJ
Iodide (I-) Solid State 127,000 to 0.06 1 to 5x10-7 2 to 12 S-2 CN- 1000 ppm as I- 281/1000s 5 M KNO3 KNO/ISA Single-Junct ***  
Lead (Pb+2) Solid State 20,800 to 0.2 0.1 to 10-6 3 to 7 Hg+2 Ag+ Cu+2 1000 ppm as Pb+2 231/1000s 5 M NaClO4 NaClO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Mercury (Hg+2) Solid State 201,000 to 0.2 1 to 10-6 0 to 2 Ag+ S-2 1000 ppm as Hg+2 251/1000s 5 M NaClO4 NaClO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Nitrate (NO3-) PVC "dry" contact 62,000 to 0.4 1 to 7x10-6 2 to 11 Cl- NO2- 1000 ppm as NO3- 021/1000s KAl(SO4)2. 12H2O POT/ISA Double-Junct. .1 M KAl(SO4)2 POT/DJ
Nitrite (NO2-) PVC "dry" contact 460 to 0.5 10-2 to 10-5 4.6 to 8 CN- 1000 ppm as NO2- 071/1000s KAl(SO4)2. 12H2O POT/ISA Single-Junct. ***  
Perchlorate (ClO4-) PVC "dry" contact 99,500 to 0.2 1 to 2x10-6 0 to 11 I- SCN- NO3- 1000 ppm asClO4- 061/1000s 2M (NH4)2SO4 NHSO/ISA Double-Junct. .1 M (NH4)2SO4 NHSO/DJ
Potassium (K+) PVC "dry" contact 39,000 to 0.04 1 to 10-6 1 to 9 Cs+ NH4+ 1000 ppm as K+ 031/1000s 5 M NaCl NaCl/ISA Double-Junct. .1 M NaCl NaCl/DJ
Silver (Ag+)

Sulfide (S-2)

Solid State 107,900 to 0.01

32,000 to 0.03

1 to 10-7

1 to 10-7

1 to 9

13 to 14

Hg+2 S-2

Hg+2 Ag+2

1000 ppm as Ag+2 211/1000s 5 M NaNO3 NaNO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Sodium (Na+) Glass Membrane 69,000 to 0.002 3 to 10-7 9 to 12 Li+ K+ Ba+2 1000 ppm as Na+ 401/1000s 4 M NH4Cl NHCl/ISA *    
Thiocyanite (SCN-) Solid State 5,800 to 1 0.1 to 2x10-6 2 to 12 Cl- Br- I- S-2 1000 ppm as SCN- 229/1000s 5 M NaNO3 NaNO/ISA Double-Junct. 1 M KNO3 KNO/DJ
Water hardness

( Ca+2 & Mg+2 )

PVC "dry" contact - 0.2 to 10-5 4.5 to 10 Cd+2 Ba+2 Cu+2 1000 ppm as Ca+2 041/1000s 4 M KCl KCl/ISA Single-Junct.*** ***  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Please note that the specifications for each Di.jpg (12956 bytes) electrode does not change with the type of construction ie. the mini, half cell, and combination cell will all have the same specification. The part numbers just have a different prefix. *Add prefix 1-half cell, 2-mini ISE,  3-a combination ISE, 4-flow cell.

Last update date : 03/28/2000

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