Determination of total organic halides in water
US4227887A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1978 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Aug 28, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/1826
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three phase process for determining total organic halides in water. The first phase is a sorptive process including passing a liquid through a packed bed of sorptive material thereby removing quantitatively, purgeable and non-purgeable, organic halides and thereafter passing an inorganic halide displacement wash solution through the bed to displace inorganic halides. The second and third phases are a combination combustion and titration whereby organic bromides and other organic halides entering the combustion phase are quantitatively titrated coulometrically. The second and third phases include in a first heating zone heating a sample, such as the sorptive material following the first phase, in the presence of a mild oxidant to a temperature sufficient to vaporize water; in a second heating zone heating any remaining sample from the first heating zone and gases therefrom in the presence of an oxidant to a temperature sufficient to complete combustion of the sample and gases; and concurrently titrating coulometrically the gases from the second heating zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.