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Preparation and use method for color development detecting sheet for detecting sulfide in water

A technology of sulfide and detection sheet, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of undiscovered reports on the development of sulfide detection sheet, and achieve the effect of low price and easy portability

Inactive Publication Date: 2013-01-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no reports on the development of sulfide detection chips have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, the preparation of the chromogenic detection sheet of measuring sulfide in water

[0017] In the first step, add 15 mL of concentrated sulfuric acid to 100 g of anhydrous sodium sulfate, and mix well to obtain a powder. Weigh 3g of ferric ammonium sulfate, grind it into powder, add it to the above powder, and mix evenly to obtain a powder mixture. Take 1g of the powdered mixture, and use a tablet press (model YP-15A) to press it into a tablet with a diameter of 10mm at 5MPa to obtain tablet I.

[0018] In the second step, weigh 4g of polyethylene glycol 4000 and 1g of N,N-dimethyl-p-phenylenediamine hydrochloride powder, melt them completely in a water bath at 50°C respectively, and then pour the polyethylene glycol 4000 Add N,N-dimethyl-p-phenylenediamine hydrochloride, mix well, cool and grind into powder. Get 1.5g of this powder and mix evenly with 30g of anhydrous sodium sulfate to obtain mixed powder. Take 0.3 g of the mixed powder and put it into ...

Embodiment 2

[0020] Embodiment 2, the determination of sulfide concentration in a certain domestic sewage

[0021] Take 10ml of certain sewage in a 10ml colorimetric tube, immerse the sulfide color detection piece prepared in Example 1, shake the colorimetric tube for 10min to dissolve the detection piece, obtain a blue-green solution, and use a portable spectrophotometer (PORS-15V Portable spectrometer (Beijing General Analysis Company), measured the absorbance of the solution at a wavelength of 665nm, and the sulfide concentration in the sewage was 0.35mg / L, which was consistent with the result of the traditional p-aminodimethylaniline photometry of 0.5mg / L , indicating that the sulfide color detection sheet is accurate and reliable. Compared with the traditional method of using spectrophotometer, the sulfide concentration in water measured by the color detection sheet of the present invention is because it is not necessary to bring color developing agent, reducing agent, pH regulator an...

Embodiment 3

[0022] Embodiment 3 Determination of certain industrial waste water sulfide concentration

[0023] Take 10ml of a certain industrial wastewater in a 10ml colorimetric tube, immerse the sulfide color detection sheet prepared in Example 1, shake the colorimetric tube for 10min to dissolve it, obtain a blue-green solution, and use a portable spectrophotometer (PORS-15V portable spectrometer (Beijing General Analysis Company), measured the absorbance of the solution at a wavelength of 665nm, and obtained that the sulfide concentration of the industrial wastewater was 1.04mg / L, which was consistent with the result of the traditional p-aminodimethylaniline photometric method of 1.11mg / L, indicating that The sulfide color detection sheet is accurate and reliable.

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Abstract

The invention relates to a preparation and use method for a color development detecting sheet for detecting sulfide in water; and the preparation method comprises the following steps of: first, uniformly mixing concentrated sulfuric acid, anhydrous sodium sulfate and ammonium ferric sulfate; pressing a mixture so as to obtain a sheet I; uniformly mixing melted polyethylene glycol 4000 and N,N-dimethyl-p-phenylenediamine hydrochloride; after cooling a mixture, grinding the mixture into a powder; uniformly mixing the powder and anhydrous sodium sulfate; pressing the mixed powder and anhydrous sodium sulfate so as to obtain a sheet II; after attaching a little amount of melted polyethylene glycol 4000 on the surface of the sheet II, rapidly bonding the sheet II and the sheet I in an integrated way, so as to form the color development detecting sheet for detecting the sulfide in the water; directly using or sealing the color development detecting sheet; and preserving the color development detecting sheet away from light. During using, the color development detecting sheet is immerged into 10 ml water to be detected; after the water is slightly shaken for 10 minutes, the detecting sheet is dissolved; and then a portable spectrophotometer is used for measuring. According to the invention, the color development detecting sheet has the advantages of convenience for carrying, easiness for safeguarding, no need of any reagent in use as well as accurate and reliable result and is suitable for field quantitative detections of the sulfides in water bodies, such as surface water, domestic sewage, industrial wastewater and so on.

Description

technical field [0001] The invention relates to a method for preparing and using a color-developing detection sheet for determining sulfide in water, and belongs to the technical field of environmental monitoring. Background technique [0002] With the rapid development of industrial technology, sudden environmental pollution accidents continue to increase, threatening human health, destroying the ecological environment, and seriously restricting ecological balance and social and economic development. There are many problems to be solved to prevent sudden pollution accidents. The first task is to establish emergency monitoring methods and technologies. Once a pollution accident occurs, it can be quickly put into monitoring, and accurate pollution data can be provided in the shortest time. Measures provide a scientific basis. Therefore, for sudden environmental pollution accidents with strong time and space characteristics and significant random changes, a timely and accurat...

Claims

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Application Information

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IPC IPC(8): G01N21/25G01N21/31
Inventor 郜洪文许夏伟徐刚袁园
Owner TONGJI UNIV
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