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Full solid T1 ion selective electrode and its preparing method

An ion-selective electrode and all-solid-state technology, applied in the field of electrodes, can solve problems such as complex pretreatment, long measurement cycle, and large equipment, and achieve the effects of strong corrosion resistance, fast detection speed, and convenient use

Inactive Publication Date: 2008-11-19
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current detection methods mainly include atomic absorption spectrophotometry and mass spectrometry, etc., but the equipment used in these methods is huge and expensive, requires complex pretreatment, long measurement period and skilled operators, which brings great problems in practical applications. Many inconvenient, so widely attracted the attention of the majority of scientific and technological personnel, and has become an important subject of urgent research and development

Method used

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  • Full solid T1 ion selective electrode and its preparing method
  • Full solid T1 ion selective electrode and its preparing method
  • Full solid T1 ion selective electrode and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] from figure 1 It can be seen that a kind of all-solid-state T1 ion selective electrode of the present invention is made of resin tube 1, and the T1 ion small column-shaped sensitive material 2 packaged in the lower nozzle of the resin tube (cylindrical or square column) is the bottom cover, the resin tube The resin cover of the upper nozzle and the copper wire 3 drawn from the resin cover and welded on the surface of the small cylinder with silver paste are composed, so that the all-solid-state T1 ion selective electrode is made.

[0020] The preparation of a kind of all-solid-state T1 ion selective electrode of the present invention:

[0021] ①Preparation of all-solid-state Tl ion-sensitive small columnar materials

[0022] Select spectrally pure compound Tl 2 S, Ag 2 S and AgI, the molar ratio is 50:25:25, after fully mixing and grinding, under the pressure of 10Mpa, make a small cuboid, put it in a quartz bottle, and heat it to 350°C under dry nitrogen, and keep i...

Embodiment 2～3

[0026] Embodiment 2~3 except selected spectrum pure compound T1 2 S, Ag 2 Except that the molar ratio of S and AgI is different from Example 1, the rest of the preparation process, steps and process conditions thereof are the same as Example 1. Spectrum pure compound T1 selected by each example in the embodiment of the present invention 1~3 2 S, Ag 2 S and AgI molar consumption and small cylinder height and width are listed in the following table 1 respectively:

[0027] Table 1 Embodiment 1~3 selected spectroscopically pure compound and its consumption (mol)

[0028]

[0029] The selectivity principle of the all-solid-state Tl ion-selective electrode is:

[0030] The Tl ions in the Tl ion small column-shaped sensitive material used for the back cover in the all-solid-state Tl ion selective electrode and the Tl ions in the solution generate an ion exchange reaction.

[0031] The characteristics of the all-solid-state Tl ion-selective electrode:

[0032] The standard c...

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Abstract

The solid Tl ion selecting electrode consists of resin tube, small resin tube bottom column of Tl ion sensitive material and resin cover. The making process of the solid Tl ion selecting electrode includes the following steps: mixing spectroscopically pure Tl2S, Ag2S and AgI in the molar ratio of 50 to 25 to 25, grinding the mixture, forming, heating in dry nitrogen inside a quartz bottle at 350 deg.c for 4 hr; naturally annealing, grinding, forming small column, heating in a vacuum quartz bottle at 350 deg.c for 4 hr; naturally annealing, and polishing to prepare Tl ion sensitive column; welding one wire with conducting silver paste to the column and setting the column to the bottom of the resin tube, and covering with resin cover to obtain the solid Tl ion selecting electrode. The electrode is portable and used in fast accurate detection of Tl ion in water, vegetable, fruit, etc.

Description

technical field [0001] The invention belongs to an electrode used for analysis, relates to an electrode for qualitatively and quantitatively detecting Tl ions, in particular to an all-solid-state Tl ion selective electrode and a preparation method thereof. Background technique [0002] Heavy metal ions (such as Zn 2+ , Pb 2+ 、Cd 2+ 、Cu 2+ 、Cr 6+ , Mn 5+ 、As 3+ , Fe 3+ , Hg 2+ ) can have harmful or even fatal effects on the human body after exceeding the standard, so the quantitative detection of heavy metals is of great significance in medicine, food, clinical and environmental monitoring. The current detection methods mainly include atomic absorption spectrophotometry and mass spectrometry, etc., but the equipment used in these methods is huge and expensive, requires complex pretreatment, long measurement period and skilled operators, which brings great problems in practical applications. Many inconvenient, therefore extensively arouse the concern of numerous scien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/333G01N27/00
Inventor 门洪王建国
Owner NORTHEAST DIANLI UNIVERSITY
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