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Fluorion sensing test paper for visual colorimetry and its uses

A complex, fluoride ion technology, applied in the field of ion detection, can solve the problem that the lower limit of the detection fluorine concentration cannot reach the safe drinking water range, etc., and achieves the effects of good selective identification, low price and convenient use

Inactive Publication Date: 2007-10-24
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the above methods are actually used for environmental detection, especially for the detection of fluoride ions in drinking water, the lower limit of the concentration of fluorine cannot reach the range of safe drinking water, and the lack of water samples for testing

Method used

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  • Fluorion sensing test paper for visual colorimetry and its uses
  • Fluorion sensing test paper for visual colorimetry and its uses
  • Fluorion sensing test paper for visual colorimetry and its uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 (synthetic of coordination compound)

[0030] 0.538 g Ru(bpy) 2 Cl2 ·3H 2 O (1 mmol), 0.243 g of 1,10-phenanthroline-5,6-dione (1 mmol), adding 30 ml of ethanol and 30 ml of H 2 In a mixed solvent of O, reflux under nitrogen atmosphere for 3 hours, concentrate to 20 ml, add KPF 6 A saturated aqueous solution of a brown precipitate precipitated out, filtered off, washed with ethanol and dried in vacuo. Yield 80%. (bpy=2,2-bipyridine).

Embodiment 2

[0031] Embodiment 2 (synthesis of coordination compound)

[0032] 0.198 g (1 mmol) of 2,4-dinitrophenylhydrazine, 0.9 g (1 mmol) of the complex of Example 1 were added to a mixture of 25 ml of acetonitrile containing 5 ml of phosphoric acid and 25 ml of ethanol The solution was refluxed for 8 hours in a nitrogen atmosphere, concentrated to 5 ml, and 100 ml of ethanol solution was added to form a purple-red precipitate, which was filtered and washed three times with ethanol. The precipitate was dissolved in 5 ml of water, and KPF was added 6 Aqueous solution, separated out purple-red precipitate, filtered off, washed with ethanol and vacuum-dried, the yield was 60%. Elemental analysis (C 10 h 8 N 2 ) 2 Ru(C 18 h 10 N 6 o 5 )(PF 6 ) 2 Values ​​are C, 41.6; H, 2.5; N, 12.7%, theoretical values ​​are C, 41.7; H, 2.4; N, 12.8%. NMR analysis 1 H NMR (500MHz, CD 3 CN), δ (ppm): 9.11 (br, 1H, -NH), 8.97 (br, 1H, H a ), 8.74 (d, 1H, H 6 ), 8.52 (m, 6H, H b , H 6 ’ and...

Embodiment 3

[0033] Embodiment 3 (selective experiment)

[0034] The acetonitrile solution of the compound of preparation embodiment 2 (2.5 * 10 -5 M), add F respectively - , Cl - , Br - , I - , HSO 4 - , NO 3 - , H 2 PO 4 - Tetrabutylamine salt solution, measured absorption spectrum as shown in Figure 1 and fluorescence spectrum as shown in Figure 2. Represents the compound of Example 2 to F - Ions have good selectivity.

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Abstract

The invention discloses a high performance selection coloration compound, the fluorinion detection method and fluorinion reagent paper based on the compound, the compound being coordinated complex characterized by single (2,4-dinitro phenyl hydrazone,10-orthophenanthrolene-5,6-diketone ligand coordination, the compound can be used for the detection of fluorinion within the concentration range of 10-5M, wherein absorption spectrophotometry or naked eye visual colorimetry detections can be employed. The color change reagent paper made through impregnating the compound can appreciably detect fluorine ions whose concentration is below 10mg / L.

Description

technical field [0001] The invention belongs to the technical field of ion detection composed of compounds for identification, binding and optical detection of anions, cations and neutral ions, and specifically relates to a fluoride ion test paper using compounds with metal coordination functional groups as identification and color development. Background technique [0002] Trace elements in the environment, especially in water, are vital to human health. For example: fluoride in drinking water, the dental caries rate of children in areas with low fluorine water will increase, and the prevalence of dental fluorosis and skeletal fluorosis will increase in people in areas with high fluoride water. Severe fluorosis can lead to the extremely painful bone fluorosis. There are three types of fluorosis in my country: water-drinking type, coal-burning type and tea-drinking type. According to a survey by Outlook News Weekly on July 22, 2005, there are more than 100 million patients...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F15/00G01N31/22G01N21/78
Inventor 段春迎白志平林志华区升举张丙广
Owner NANJING UNIV