Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1985-11-19
1987-12-29
Levy, Stewart J.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
422 70, 436161, G01N 3108
Patent
active
047152168
ABSTRACT:
For the determination of low ion concentrations in aqueous specimens by ion chromatography with aqueous eluents, the test specimen is added to a stream of extra-pure water, which is mixed immediately ahead of the separation column with an appropriately concentrated eluent. Alternatively, the ions are previously fixed to an adsorber, and eluted from the more highly concentrated eluent, which is again mixed ahead of the separation column with extra-pure water to achieve the concentration necessary for ion chromatography. For such a pre-enrichment, there are two small pre-enrichment columns, which are flowed through by extra-pure water containing the specimen or concentrated eluents alternately in reverse directions from analysis cycle to analysis cycle. An additional purification of the extra-pure water and eluent feed is recommended, as is a pulsation damping by a membrane of a two-headed pump located between the eluent branch and the extra-pure water branch, each with a volume of approximately 1.5 to 2 times the pump stroke.
REFERENCES:
patent: 3419051 (1968-12-01), Gustafson et al.
patent: 3923460 (1975-12-01), Parrott et al.
patent: 4032445 (1977-06-01), Munk
patent: 4043906 (1977-08-01), Helmer
patent: 4165219 (1979-08-01), Huber
patent: 4239623 (1980-12-01), Schrenker
patent: 4267056 (1981-05-01), McClure
patent: 4427298 (1984-01-01), Fahy et al.
Erich Heftmann; A Laboratory Handbook of Chromatographic & Electrophoretic ethods, Third Edition.
Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftun
Levy Stewart J.
Ljungman Nils H.
Williams Hezron E.
LandOfFree
Process and apparatus for the chromatographic determination of c does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for the chromatographic determination of c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for the chromatographic determination of c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-455349