Method for measurement of no contents
OwnerAndreas P. Termininventor
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Abstract
The present invention relates to a method and a device for the measurement of NO contents in liquids using an inert carder gas. The device consists of a micro reaction part FIG. 1 which is divided into an inert gas inlet nozzle 1, the microreaction vessel 2 with frit 3, at least one inlet nozzle for the injection of the liquid to be analyzed 4, as well as a cooled outlet nozzle for the inert gas loaded with NO 5, and a detector 6, with which the NO content of the inset liquid is measured and evaluated, and where the NO.sub.2 - ions present in the solution are reduced back to NO using a reaction mixture consisting out of 1,1'-dimethylferrocene in acetonitrile in an acidic medium, preferably perchloric acid.
Claims8
A method for reducing NO.sub.2 - ions into nitric oxide in liquids containing nitric oxide, wherein said method is carried out at a temperature of 5.degree. C.-50.degree. C. and comprises the steps of:
- providing a device including a micro reaction vessel with frit, an inlet nozzle with injection septum, an inert gas inlet nozzle attached to a first end of said reaction vessel, an outlet nozzle attached to a second end of said reaction vessel, means for cooling said outlet nozzle, and a detector;
- introducing a reducing solution consisting of 1,1'-dimethylferrocene in acetonitrile in an acidic medium into the micro reaction vessel;
- introducing a liquid containing nitric oxide into the reducing solution in the micro reaction vessel to form a reaction solution;
- and
- mixing the reaction solution by an inert gas stream which is infused into the reaction solution through the frit, where the inert gas simultaneously acts as a carrier gas for the nitric oxide gas, which is transported via the outlet nozzle to the detector where total nitric oxide content is determined.
Dependencies are inferred from the claim text.