Measurement of gaseous fluoride concentration using an internal reference solution
US4428800A · kind A · utility
6Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1982 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Sep 15, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/193333
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring fluoride concentrations in a gas wherein a sample of the gas is mixed with an internal reference solution in a gas scrubber to form a fluoride-containing solution. The fluoride-containing solution is collected, and the concentration of fluoride ion is determined in a potentiometric apparatus. The apparatus includes a first electrode having a fluoride-sensitive element and a second electrode having an element sensitive to a halide ion other than fluoride ion. The improved method of the invention compensates for errors caused by evaporation of water from the gas scrubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.