TYPE | ppm | Slope mv | PH Range | Interference | Ref Solution |
NH4+ AMMONIUM | 0.1~18,000 | 55 ± 3mV | Above 11 | Volatile amines | Ref solution |
NH3 AMMONIA | 0.01~17,000 | 56 ± 3mV | Above 11 | Volatile amines | Ref solution |
Br- Bromide | 0.4~79,900 | 57 ± 3mV | 2~14pH | I-,CN-,S-- | KNO3(2) |
CL- Chloride | 1.8~35,500 | 56 ± 3mV | 2-11 | I-,S--,Br-,CN- | KNO3(2) |
CU++ Copper | 0.01~6,530 | 27 ± 2mV | 2-12 | Ag+, Hg++ Cl-,Br-, Fe++,Cd++ | KNO3(2) |
CN- Cyanide | 0.1~260 | 57 ± 2mV | 2-13 | S--,I-,Br-,Cl- | KNO3(2) |
F- Fluoride | 0.02~5,000 | 57 ± 2mV | 5-8 | OH- | KCl(1) |
I- Iodide | 0.01~127,000 | 57 ± 3mV | 0-14 | S--,CN-,Br- | KNO3(2) |
Pb++ Lead | 0.2~20,700 | 26 ± 3mV | 3-8 | Ag+, Hg++ | KNO3(2) |
K+ Potassium | 0.04~39,000 | 56 ± 3mV | 2-12 | Cs+,NH4+ | NaCl(3) |
Ag+ Silver | 107900-0.01 | 57 ± 2mV | 2-8 | Hg++, Hg+ | KNO3(2) |
S- - Sulfide | 32100-0.003 | 27 ± 2mV | Above 11 | Hg++, Hg+ | KNO3(2) |
Na+ Sodium | 0.02~50,000 | 56 ± 3mV | 5-12 | H+ ,Li+, Ag+ | NH4Cl(4) |
Ca++ Calcium | 0.2~40,000 | 26 ± 2mV | 3-10 | Pb++,Hg++,Cu++ Ni++ | KNO3(2) |