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On-site rapid detection method for fluorinion in water and capable of eliminating reagent blank effects

A detection method, the technology of fluorine ions, is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions. It can solve the problems that the dissolution time is difficult to effectively control and the reagent blank cannot be eliminated. Achieve the effect of high accuracy, easy operation and simple method

Inactive Publication Date: 2016-01-27
WENZHOU MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a rapid on-site detection method for fluoride ions in water that can eliminate the influence of reagent blanks, so as to achieve rapid and accurate on-site determination of fluoride ions in water, and overcome the problem of dissolution time in the use of dry powder detection reagents in the prior art Due to the difference, it is difficult to effectively control the detection time. Because the standard color card that does not deduct the reagent blank is used, the standard color card is directly compared with the sample tube to obtain the result during color comparison, and the fluctuation of the reagent blank cannot be eliminated, which will adversely affect the accuracy of the test results. Shortcomings

Method used

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  • On-site rapid detection method for fluorinion in water and capable of eliminating reagent blank effects
  • On-site rapid detection method for fluorinion in water and capable of eliminating reagent blank effects

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1. Weigh 1.0g 1-chloromethyl-4-fluoro-1,4-diazide bicyclo-2,2,2-octane bis(tetrafluoroborate), 0.1g ethylenediaminetetraacetic acid Disodium, add 800ml 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution and stir to dissolve, then add 0.05ml emulsifier OP-10, 20ml ethylene glycol, stir to dissolve, then use 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution to make up the volume to 1000ml, to obtain 1000ml containing 1.0g / L1-chloromethyl-4-fluoro-1,4-diazobicyclo-2,2,2-octane bis(tetrafluoroborate), 0.05ml / L Emulsifier OP-10, 0.1g / L disodium edetate, 20ml / L ethylene glycol, 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution is a liquid fluoride ion detection reagent;

[0040] Step 2: Take seven 10ml glass colorimetric tubes, set the first colorimetric tube as a blank tube, and the second to seventh colorimetric tubes as standard tubes, add 10ml deionized water and 10ml into the blank tube and standard tube respectively Fluoride ion standard sol...

Embodiment 2

[0046] Step 1. Weigh 1.5g 1-chloromethyl-4-fluoro-1,4-diazide bicyclo-2,2,2-octane bis(tetrafluoroborate), 0.3g ethylenediaminetetraacetic acid Dissodium, add 800ml 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution and stir to dissolve, then add 0.075ml emulsifier OP-10, 35ml ethylene glycol, stir to dissolve, then use 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution to make up the volume to 1000ml, to obtain 1000ml containing 1.5g / L1-chloromethyl-4-fluoro-1,4-diazobicyclo-2,2,2-octane bis(tetrafluoroborate), 0.075ml / L Emulsifier OP-10, 0.3g / L disodium edetate, 35ml / L ethylene glycol, 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution is a liquid fluoride ion detection reagent;

[0047] Step 2: Take seven 10ml glass colorimetric tubes, set the first colorimetric tube as a blank tube, and the second to seventh colorimetric tubes as standard tubes, add 10ml deionized water and 10ml into the blank tube and standard tube respectively Fluoride ion standard ...

Embodiment 3

[0053] Step 1. Weigh 2.0g 1-chloromethyl-4-fluoro-1,4-diazide bicyclo-2,2,2-octane bis(tetrafluoroborate), 0.5g ethylenediaminetetraacetic acid Disodium, add 800ml 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution and stir to dissolve, then add 0.10ml emulsifier OP-10, 50ml ethylene glycol, stir to dissolve, then use 50mmol / LpH4.10 acetic acid-sodium acetate buffer solution to make up the volume to 1000ml, to obtain 1000ml containing 2.0g / L1-chloromethyl-4-fluoro-1,4-diazobicyclo2.2.2 octane bis(tetrafluoroborate), 0.10ml / L emulsifier OP- 10. 0.5g / L disodium edetate, 50mmol / L pH4.10 acetic acid-sodium acetate buffer solution of 50ml / L ethylene glycol is a liquid fluoride ion detection reagent;

[0054] Step 2: Take seven 10ml glass colorimetric tubes, set the first colorimetric tube as a blank tube, and the second to seventh colorimetric tubes as standard tubes, add 10ml deionized water and 10ml into the blank tube and standard tube respectively Fluoride ion standard ...

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Abstract

The invention discloses an on-site rapid detection method for fluorinion in water and capable of eliminating reagent blank effects. The method is as follows: preparation of a liquid-type fluorinion detection reagent is carried out; a standard color card in deduction of reagent blank color and with a transparent plastic plate as a support material is made; the blank tube color is overlaid on the standard color card and contrast with a sample tube is carried out during detection. The method is simple, the accuracy is high and operation is easy. The liquid-type fluorinion detection reagent is employed for detection and time of the whole detection process can be controlled effectively. The blank tube color is overlaid on the standard color card, then colorimetric contrast with the sample tube is carried out, and thus adverse effects of fluctuation of reagent blank on the detection result accuracy can be eliminated effectively. The detection method is especially suitable for on-site rapid detection of fluorinion in water.

Description

technical field [0001] The invention belongs to the field of water quality detection, and in particular relates to a rapid on-site detection method for fluorine ions in water which can eliminate the influence of reagent blanks. 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 ...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 连国军
Owner WENZHOU MEDICAL UNIV
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