A method for rapid detection of chlorine dioxide content in water that can eliminate the influence of reagent blank

Abstract

The invention discloses a method for rapidly detecting chlorine dioxide content in water capable of eliminating the influence of reagent blanks. In the method, a liquid chlorine dioxide detection reagent is prepared first, and then a colorless transparent PVC plastic plate is used to prepare chlorine dioxide for deducting reagent blanks. Standard color card, when testing, place the chlorine dioxide standard color card at the bottom of the blank tube, read the chlorine dioxide concentration corresponding to the standard color card when the color is consistent with the sample tube, and obtain the chlorine dioxide concentration in the water sample. The detection of chlorine dioxide concentration by this method can eliminate the influence of the reagent blank on the detection results, and is especially suitable for rapid on-site detection of chlorine dioxide in water.

Description

technical field

[0001] The present invention relates to the field of water quality detection, in particular to a method for rapidly detecting chlorine dioxide content in water that can eliminate the influence of reagent blanks. Background technique

[0002] Chlorine dioxide (ClO 2 ) is the latest generation of high-efficiency, broad-spectrum and safe sterilizing and fresh-keeping agents recognized internationally at present, and is the most ideal substitute for chlorine preparations, and has been widely used in developed countries in the world. Drinking water treated with chlorine dioxide will not produce teratogenic, mutagenic, and carcinogenic chloroform that is usually produced when chlorine-containing disinfectants such as sodium hypochlorite are used, but skin contact or ingestion of solutions containing high concentrations of chlorine dioxide , may still cause strong irritation and corrosion.

[0003] The detection of chlorine dioxide in water mostly uses direct colo...

Examples

Embodiment 1

[0033] (1) Preparation of liquid chlorine dioxide detection reagent, the liquid chlorine dioxide detection reagent is configured into a solution with the following components and deionized water according to the concentration of the substance,

[0034] (N,N-Diethyl-1,4-phenylenediamine) sulfate 0.19 mmol / L

[0035] Glycine 0.267 mol / L

[0036] Disodium EDTA 2.69 mmol / L

[0037] Ethylene glycol 0.36 mol / L

[0038] pH6.50 phosphate buffer 30 mmol / L;

[0039] (2) Preparation of chlorine dioxide standard color card after deducting the reagent blank, take seven 10ml glass colorimetric tubes, set the first colorimetric tube as blank tube, and the 2nd to 7th colorimetric tubes as standard tubes, respectively Add 10ml deionized water and 10ml chlorine dioxide standard with concentrations of 0.05mg / L, 0.10mg / L, 0.20mg / L, 0.30mg / L, 0.50mg / L, 0.80mg / L to the blank tube and standard tube Solution, then add 0.2ml of the liquid chlorine dioxide detection reagent described in step (1), r...

Embodiment 2

[0042] (1) Preparation of a liquid chlorine dioxide detection reagent, the liquid chlorine dioxide detection reagent is configured into a solution with the following components and deionized water according to the concentration of the substance,

[0043] (N,N-Diethyl-1,4-phenylenediamine) sulfate 0.28 mmol / L

[0044] Glycine 0.471 mol / L

[0045] Disodium EDTA 4.04 mmol / L

[0046] Ethylene glycol 0.63 mol / L

[0047] pH6.50 phosphate buffer 50 mmol / L;

[0048](2) Preparation of chlorine dioxide standard color card after deducting the reagent blank, take seven 10ml glass colorimetric tubes, set the first colorimetric tube as blank tube, and the 2nd to 7th colorimetric tubes as standard tubes, respectively Add 10ml deionized water and 10ml chlorine dioxide standard with concentrations of 0.05mg / L, 0.10mg / L, 0.20mg / L, 0.30mg / L, 0.50mg / L, 0.80mg / L to the blank tube and standard tube Solution, then add 0.2ml of the liquid chlorine dioxide detection reagent described in step (1), ...

Embodiment 3

[0051] (1) Preparation of liquid chlorine dioxide detection reagent, the liquid chlorine dioxide detection reagent is configured into a solution with the following components and deionized water according to the concentration of the substance,

[0052] (N,N-Diethyl-1,4-phenylenediamine) sulfate 0.38 mmol / L

[0053] Glycine 0.675 mol / L

[0054] Disodium EDTA 4.04 mmol / L

[0055] Ethylene glycol 0.90 mol / L

[0056] pH6.50 phosphate buffer 80 mmol / L;

[0057] (2) Preparation of chlorine dioxide standard color card after deducting the reagent blank, take seven 10ml glass colorimetric tubes, set the first colorimetric tube as blank tube, and the 2nd to 7th colorimetric tubes as standard tubes, respectively Add 10ml deionized water and 10ml chlorine dioxide standard with concentrations of 0.05mg / L, 0.10mg / L, 0.20mg / L, 0.30mg / L, 0.50mg / L, 0.80mg / L to the blank tube and standard tube Solution, then add 0.2ml of the liquid chlorine dioxide detection reagent described in step (1), r...

technical field

[0001] The present invention relates to the field of water quality detection, in particular to a method for rapidly detecting chlorine dioxide content in water that can eliminate the influence of reagent blanks. Background technique

[0002] Chlorine dioxide (ClO 2 ) is the latest generation of high-efficiency, broad-spectrum and safe sterilizing and fresh-keeping agents recognized internationally at present, and is the most ideal substitute for chlorine preparations, and has been widely used in developed countries in the world. Drinking water treated with chlorine dioxide will not produce teratogenic, mutagenic, and carcinogenic chloroform that is usually produced when chlorine-containing disinfectants such as sodium hypochlorite are used, but skin contact or ingestion of solutions containing high concentrations of chlorine dioxide , may still cause strong irritation and corrosion.

[0003] The detection of chlorine dioxide in water mostly uses direct colo...

Examples

Embodiment 1

[0033] (1) Preparation of liquid chlorine dioxide detection reagent, the liquid chlorine dioxide detection reagent is configured into a solution with the following components and deionized water according to the concentration of the substance,

[0034] (N,N-Diethyl-1,4-phenylenediamine) sulfate 0.19 mmol / L

[0035] Glycine 0.267 mol / L

[0036] Disodium EDTA 2.69 mmol / L

[0037] Ethylene glycol 0.36 mol / L

[0038] pH6.50 phosphate buffer 30 mmol / L;

[0039] (2) Preparation of chlorine dioxide standard color card after deducting the reagent blank, take seven 10ml glass colorimetric tubes, set the first colorimetric tube as blank tube, and the 2nd to 7th colorimetric tubes as standard tubes, respectively Add 10ml deionized water and 10ml chlorine dioxide standard with concentrations of 0.05mg / L, 0.10mg / L, 0.20mg / L, 0.30mg / L, 0.50mg / L, 0.80mg / L to the blank tube and standard tube Solution, then add 0.2ml of the liquid chlorine dioxide detection reagent described in step (1), r...

Embodiment 2

[0042] (1) Preparation of a liquid chlorine dioxide detection reagent, the liquid chlorine dioxide detection reagent is configured into a solution with the following components and deionized water according to the concentration of the substance,

[0043] (N,N-Diethyl-1,4-phenylenediamine) sulfate 0.28 mmol / L

[0044] Glycine 0.471 mol / L

[0045] Disodium EDTA 4.04 mmol / L

[0046] Ethylene glycol 0.63 mol / L

[0047] pH6.50 phosphate buffer 50 mmol / L;

[0048](2) Preparation of chlorine dioxide standard color card after deducting the reagent blank, take seven 10ml glass colorimetric tubes, set the first colorimetric tube as blank tube, and the 2nd to 7th colorimetric tubes as standard tubes, respectively Add 10ml deionized water and 10ml chlorine dioxide standard with concentrations of 0.05mg / L, 0.10mg / L, 0.20mg / L, 0.30mg / L, 0.50mg / L, 0.80mg / L to the blank tube and standard tube Solution, then add 0.2ml of the liquid chlorine dioxide detection reagent described in step (1), ...

Embodiment 3

[0051] (1) Preparation of liquid chlorine dioxide detection reagent, the liquid chlorine dioxide detection reagent is configured into a solution with the following components and deionized water according to the concentration of the substance,

[0052] (N,N-Diethyl-1,4-phenylenediamine) sulfate 0.38 mmol / L

[0053] Glycine 0.675 mol / L

[0054] Disodium EDTA 4.04 mmol / L

[0055] Ethylene glycol 0.90 mol / L

[0056] pH6.50 phosphate buffer 80 mmol / L;

[0057] (2) Preparation of chlorine dioxide standard color card after deducting the reagent blank, take seven 10ml glass colorimetric tubes, set the first colorimetric tube as blank tube, and the 2nd to 7th colorimetric tubes as standard tubes, respectively Add 10ml deionized water and 10ml chlorine dioxide standard with concentrations of 0.05mg / L, 0.10mg / L, 0.20mg / L, 0.30mg / L, 0.50mg / L, 0.80mg / L to the blank tube and standard tube Solution, then add 0.2ml of the liquid chlorine dioxide detection reagent described in step (1), r...

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