Device and method for estimating three nitrogen-including ionic substances in water
AssigneeMeidensha Corporation
InventorsToyoaki Aoki, Hiroshi Tsugura
Life of this patent
Estimating the term…
Abstract
To estimate nitric acid ions and nitrous acid ions in a sample solution, a method is proposed which comprises the steps of (a) feeding both the sample solution and a reducing agent to an acidic solution which is flowing in a thin pipe; (b) positively mixing the sample solution and the reducing agent and thus reacting the same in a given portion of the pipe; (c) leading the reacted solution to a gas/liquid separator thereby to separate a gaseous phase from the reacted solution; and (d) estimating the nitric acid ions and nitrous acid ions in the gaseous phase.
Claims13
A method for estimating ammonium ions, nitric acid ions and nitrous acid ions in a sample solution, comprising the steps of:
- (a) feeding the sample solution to a carrier which is flowing in a pipe;
- (b) selectively feeding a plurality of reagents to the flowing carrier;
- (c) positively mixing the sample solution and the reagents one after another in a portion of the pipe thereby producing three types of reacted solutions in the portion of the pipe;
- (d) leading the reacted solutions to a gas/liquid separator to separate a gaseous phase from each reacted solution;
- (e) heating each gaseous phase to produce nitrogen monoxide;
- and
- (f) estimating the ammonium ions, the nitric acid ions and the nitrous acid ions in the three types of nitrogen monoxides produced wherein at the step (c), hypochlorous acid or sodium hypochlorite is used as the reagent when the ions which are to be estimated are ammonium ions, in which titanium trichloride is used as the reagent when the ions which are to be estimated are nitric acid ions, and in which potassium iodide is used as the reagent when the ions which are to be estimated are nitrous acid ions.
An analyzing device for estimating ammonium ions, nitric acid ions and nitrous acid ions in a sample solution, comprising:
- a pipe;
- means for feeding the pipe with a carrier;
- first means for feeding the carrier with the sample solution;
- second means for selectively feeding one of three reagents to the flowing carrier, wherein the three reagents are a hypochlorous acid or sodium hypochlorite reagent for ammonium ions, a titanium trichloride reagent for nitric acid ions, and a potassium iodide reagent for nitrous acid ions;
- a mixing coil arranged in said pipe, said mixing coil positively mixing the sample solution the reagents one after another thereby to produce three types of reacted solutions;
- a gas/liquid separator arranged in said pipe downstream of the mixing coil, said separator separating a gaseous phase from each reacted solution;
- a heater for heating each gaseous phase thereby to produce nitrogen monoxide;
- and
- a detector for estimating the ammonium ions, the nitric acid ions and the nitrous acid ions in the three types of nitrogen monoxides produced.
Dependencies are inferred from the claim text.