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Indicator-array-based anion detection method

An indicator and anion technology, applied in the field of sensor arrays, to achieve the effect of uniform and stable color, simplified design and improved efficiency

Active Publication Date: 2015-09-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the above problems, the object of the present invention is to provide a method of using a single organic dye to chelate the same metal with different concentrations to form an array for the detection of multiple trace anions in water

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Embodiment 1

[0037] 1) Construction of the indicator array: the organic dye 2-(3,5-dibromo-2-pyridylazo)-5-diethylaminophenol was dissolved in 1:1 ethanol / water, and after reacting with metal mercury ions, the organic The dye concentration is 5×10 -6 M; the concentration of metal ion mercury is 1×10 -5 , 2×10 -5 , 3×10 -5 , 4×10 -5 , 5×10 -5 , 6×10 -5 , 7×10 -5 , 8×10 -5 , 9×10 -5 , 1×10 -4 , 2×10 -4 , 5×10 -4 M, 12 (6×2) indicator solutions were obtained; 180 μL of each indicator solution was placed in a container with a transparent bottom to form an indicator array;

[0038] 2) Establishment of anion "fingerprint library": add 18 μL of anion standard solution to each indicator solution in step 1), and the concentrations of anions in the solution after mixing are S 2- (3.0×10 -5 M), F - (5.6×10 -4 M), Cl - (7.05×10 -3 M), Br - (5.0×10 -5 M), I - (5.0×10 -5 M), PO 4 3- (1.0×10 -4 M), CrO 4 2- (2.88x10 -5 M), C 2 o 4 2- (5×10 -4 M); Anion and organic dyes unde...

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Abstract

The present invention relates to an indicator-array-based anion detection method used for the detection of multiple anions in water. Under the circumstance of certain concentration of an organic dye, chelates of different color gradients can be obtained by adding different amounts of same metal ion, and a sensor array is constructed by different concentrations of metal chelates; with the aid of the principle that anions in a water solution can be reacted with a metal to precipitate and even further reacted to produce a complex, metal ions can be replaced from the colored chelates, and the color changes. Due to different reaction equilibrium constants of different anions and a same indicator, the purpose of distinguishing of the anions can be achieved. By use of the method, whether S<2->, F<->, Cl<->, Br<->, I<->, CrO4<2->, PO4<3->, and C2O4<2-> anions in water exceed sewage or drinking water national discharge standards can be quickly determined, and by use of cluster analysis, principal component analysis and other mathematical statistic methods, unknown anions can be qualitatively or semi-quantitatively analyzed.

Description

technical field [0001] The invention relates to a sensor array, in particular to a method in which a single organic dye chelates metal ions of different concentrations to form a colorimetric sensor array for detecting multiple anions in water. Background technique [0002] Anions play a fundamental role in life systems, environmental systems and chemical production. With the acceleration of my country's industrialization process, people's living standards are improving year by year, and the resulting environmental pollution has become a common concern of the country and the public. Among them, the threat of anion pollutants to human health cannot be ignored. These anionic pollutants mainly include cyanide, sulfide, sulfate, chloride, fluoride, iodide, nitrite and so on. Non-ferrous metallurgy, steel and aluminum processing, coke, synthetic plexiglass, ceramics, electronics, electroplating, chemical fertilizers, wastewater from pesticide plants, pesticides, etc. may all prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 冯亮关亚风李慧贾明艳张雨
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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