Detection kit for on-site quick detection of fluorine ions in water and preparing method

A technology for detecting reagents and fluoride ions, which is used in material analysis by observing the influence of chemical indicators, and analysis by causing chemical reactions to occur in materials, etc. It can solve problems such as difficult time control and adverse effects on the accuracy of detection results. , to achieve the effect of high accuracy, easy operation and elimination of influence

Inactive Publication Date: 2016-10-05
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the temperature of water samples collected in different seasons and different regions is not the same, the time required for dissolving dry powder detection reagents is also different. It is difficult to effectively control the time required for the entire detection process, which also adversely affects the accuracy of the detection results.

Method used

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  • Detection kit for on-site quick detection of fluorine ions in water and preparing method
  • Detection kit for on-site quick detection of fluorine ions in water and preparing method
  • Detection kit for on-site quick detection of fluorine ions in water and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A rapid on-site detection kit for fluoride ions in water, the kit is composed of the following materials:

[0023] Liquid fluoride ion detection reagent 1 bottle (10ml)

[0024] Fluoride ion standard color card 1 piece

[0025] The preparation method of this kit is realized through the following steps:

[0026] 1. Preparation method of liquid fluoride ion detection reagent:

[0027] (1), weigh 1.5g 1-chloromethyl-4-fluoro-1,4-diazide bicyclo-2,2,2-octane bis(tetrafluoroborate), 0.3g ethylenediamine Disodium tetraacetate, add 800ml 50mmol / L pH4.10 acetic acid-sodium acetate buffer and stir to dissolve;

[0028] (2), add 0.075ml emulsifier OP, 30ml ethylene glycol, stir to dissolve;

[0029] (3) Dilute to 1000ml with 50mmol / L pH4.10 acetic acid-sodium acetate buffer solution.

[0030] 2. Preparation method of fluoride ion standard color card:

[0031] (1) Accurately weigh 0.4420g of high-grade pure sodium fluoride, dissolve it with deionized water and set the volume...

Embodiment 2

[0037] In order to further prove the inventiveness of the present invention, the present invention has done following comparative experiment, investigates the impact of the change of reagent blank on the accuracy of measurement result. The on-the-spot rapid detection kit for fluoride ion in water described in Example 1 of this law is the test group, and the detection kit that does not deduct the reagent blank and uses the standard color card for direct colorimetry is the control group, and the detection reagents of the two groups of kits are Store in a 4°C refrigerator and a 37°C water bath for 7 days, and measure the same water sample whose fluoride ion concentration is 0.50 mg / L by the fluoride ion selective electrode method, and use deionized water instead of the water sample for reagent blank Test, record the reagent blank value with a 721 spectrophotometer, the optical path of the cuvette is 1cm during the test, the test wavelength is 630nm, the reference solution is deion...

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Abstract

The invention discloses a detection kit which is used for on-site quick detection of fluorine ions in water and capable of eliminating reagent blank influences and a preparing method of the kit. In a faintly acid medium, fluorine in water reacts with 1-chloromethyl-4-fluorine-1,4-diazoniabicyclo-2,2,2-octane bis(tetrafluoroborate) to generate a blue complex, and the shade of the blue complex is in direct proportion to the concentration of fluorine ions; a comparison with a test tube is made after the color of a fluorine ion standard color chart with reagent blank eliminated and a blank tube color are overlaid, and the concentration of fluorine ions in a water sample to be tested is obtained. The detection kit is especially suitable for on-site quick detection of fluorine ions in water.

Description

technical field [0001] The invention relates to the field of water quality detection, in particular to an on-site rapid detection kit for fluorine ions in water and a preparation method. Background technique [0002] Fluoride exists widely in nature, and the concentration of fluoride in natural water is generally 0.2-0.5mg / L. The sanitary standard for drinking water (GB5750-1985) stipulates that the concentration of fluorine in drinking water should be ≤1mg / L. Fluorine is one of the essential trace elements in the human body. When the fluorine content in the human body is lower than 0.5mg / L, it is easy to suffer from dental caries; but at the same time, fluorine is one of the toxic elements. Excessive fluoride can cause periosteal hyperplasia, cause bone spurs and other diseases, lead to osteoporosis, joint sclerosis, and endanger the normal physiological functions of bones. In addition, if children consume high fluoride for a long time before the age of six or seven, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 黄珊珊何以帖张梦矜连国军
Owner WENZHOU MEDICAL UNIV
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