| Patent Number |
Title Of Patent |
Date Issued |
| 4849058 |
Method of detecting nitrogen oxides in gaseous or liquid samples |
July 18, 1989 |
| A method for determining nitrogen oxides in gaseous or liquid samples is disclosed. A semi-permeable membrane- type sensor comprising a sensor electrode, reference electrode and an electrolyte having a pH range of 6.8-8.0 or 8.0-9.2 is used. Potential between the electrodes is monitored |
| 4846937 |
Method of detecting carbon dioxide in a gaseous or liquid sample |
July 11, 1989 |
| A method is disclosed for determining carbon dioxide content in gaseous or liquid samples. A semi-permeable membrane-type sensor comprising a sensor electrode, reference electrode and an electrolyte having a pH range of 9.5-11.0 or 10.7-12.0 is used. Potential between the electrodes is |
| 4842697 |
Method of determining ammonia in a gaseous or liquid sample |
June 27, 1989 |
| A method of determining ammonia in a gaseous or liquid sample is disclosed. A sensor comprising a sensing electrode, a reference electrode, a semi-permeable membrane and an electrolyte is used. The electrolyte is buffered to a pH value between 4.5 and 6.5 and is initially free of any |
| 4780185 |
Method of determining H.sub.2 S |
October 25, 1988 |
| Gas detection electrochemical cell featuring, in one aspect, a liquid electrolyte free of any salt capable of dissociating to form in said electrolyte a weak acid or weak base (other than H.sub.3 O.sup.+ or OH.sup.-) which forms upon dissociation of the gas being measured. |
| 4756804 |
Method of detecting hydrogen cyanide gas in a gaseous or liquid sample |
July 12, 1988 |
| A method of detecting hydrogen cyanide using an electrochemical cell is disclosed. The cell comprises an electrolyte which is initially free of any salt capable of dissociating to form cyanide ions, a pH detection electrode and a reference electrode. A membrane permeable to hydrogen |
| 4659434 |
Gas sensor |
April 21, 1987 |
| Gas detection electrochemical cell featuring, in one aspect, a liquid electrolyte free of any salt capable of dissociating to form in said electrolyte a weak acid or weak base (other than H.sub.3 O.sup.+ or OH.sup.-) which forms upon dissociation of the gas being measured. |
| 4614871 |
Photodiode |
September 30, 1986 |
| A non-evacuated photodiode for detecting far-uv radiation. The photocathode is a cylindrical element surrounded by an annular anode. The photocathode is constructed of a metal (e.g., nickel) that emits electrons only in response to far-uv radiation of 140 nanometer or shorter wavelengths |
| 4549953 |
Ion-selective electrodes |
October 29, 1985 |
| Electrochemical cell including an ion-specific membrane containing, in one aspect, Ag, S, and Sb and in another aspect a ternary compound of Ag, S and one of As, Sb, Se and Te. Methods are disclosed for making ternary compounds of Ag, S and one of Se, Sb, Te and As. |
