Copper ion test paper and preparation thereof

A copper ion and test paper technology, applied in the field of chemical analysis, can solve the problems of low detection sensitivity and large color developing agent, and achieve the effects of good selectivity, simple production and intuitive detection.

Inactive Publication Date: 2008-10-08
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The amount of chromogen used in this test paper is relatively large, and the detection sensitivity is low

Method used

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  • Copper ion test paper and preparation thereof
  • Copper ion test paper and preparation thereof

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0026] as attached figure 1 As shown, the copper ion test paper of this embodiment includes a chromogenic sheet 1 and a substrate 2 . Chromogenic film 1 is that the area is 1 to 5cm 2 Chromatographic, qualitative or quantitative filter paper, the weight is 200g / m 2 Above, the water absorption is better; the substrate 2 is a polystyrene substrate or a white non-absorbent hard paper sheet, with a length of 5 to 10 cm and a width of 3 to 5 cm.

[0027] The preparation method of present embodiment copper ion test paper comprises the following steps:

[0028] 1. making the salt of o-hydroxybenzaldehyde and indoline undergo condensation reaction to prepare spiropyran;

[0029] 2. Dissolving the prepared spiropyran in absolute ethanol to prepare a 0.5mmol / L solution;

[0030] 3. Cut chromatography, qualitative or quantitative filter paper into 1 to 5cm 2 The t...

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Abstract

The invention discloses cupric ion test paper and a preparation method. The cupric ion test paper of the invention includes a chromogenic piece, and chromogenic substance spiropyran in the chromogenic piece, the chromogenic piece can be chromatography, qualitative, and quantitative filter paper. The invention also includes a base plate, the chromogenic piece is arrange on the base plate, the base plate can be a hardness paper piece which is a polystyrene base plate or white color and non-absorbent. The cupric ion test paper of the invention has a flowing reparation method, which steps include that: a) spiropyran solution is prepared; b) the chromogenic piece is dipped into the spiropyran solution; c) the chromogenic piece is taken out from the spiropyran solution and is dried, further include d) one or more chromogenic pieces which are dried are fixed on the base plate, the chromogenic pieces can be fixed in row or in cascading. The test paper of the invention is easy to use, high sensitivity, greater selectivity and stability, easy to preserve and is applicable for detecting consistency of bivalent cupric ion in water solution.

Description

technical field [0001] The invention relates to a copper ion test paper and a preparation method thereof, more specifically, the present invention relates to a test paper for detecting the concentration of divalent copper ions in an aqueous solution and a preparation method of the test paper. It belongs to the field of chemical analysis. Background technique [0002] At present, the common methods for detecting the concentration of copper ions include fluorescence method, atomic absorption spectrometry, electrochemical method, etc. These methods have high sensitivity, but they need to be carried out in the laboratory, require complex instruments, are expensive, and require a full-time professional Although the traditional colorimetric method is not as sensitive and accurate as the instrumental analysis method, it does not require any complicated instruments and is simple and convenient to operate, so it has certain application value. [0003] Chinese patent application numb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 杨荣华邵娜陈永康
Owner PEKING UNIV
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