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Full solid Pb ion selecting electrode and its preparing method

An ion-selective electrode and all-solid-state technology, applied in the field of electrodes, can solve the problems of inconvenient portability, long measurement cycle, complex pretreatment, etc., and achieve the effects of convenient portability, fast measurement, and strong corrosion resistance

Inactive Publication Date: 2007-04-11
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the equipment using these methods is huge, inconvenient to carry, expensive, requires complex pretreatment, long measurement cycle and requires skilled operators, which brings many difficulties and inconveniences to practical applications

Method used

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  • Full solid Pb ion selecting electrode and its preparing method
  • Full solid Pb ion selecting electrode and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] As can be seen from Fig. 1, the all-solid-state Pb ion selective electrode of the present invention, it is by the epoxy (polyethylene, hereinafter the same) resin tube (cylindrical or square tube) 1, the full-body that is provided with in this resin tube 1 lower orifice Solid Pb ion small column-shaped sensitive material 2 (back cover), on the upper surface of the small column with silver paste, is formed by welding a copper wire 3 and a resin cover that the upper nozzle is provided with; the copper wire 3 is formed from the described Resin capping leads out; above-mentioned all-solid-state solid-state Pb ion small columnar sensitive material is made of sensitive spectrum pure compound PbS, As to Pb ion 2 S 3 And AgI, mixed with a molar ratio of 50:20:30.

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

[0021] (1) Preparation of Pb ion sensitive material and its all-solid Pb ion small columnar sensitive mater...

Embodiment 2～3

[0026] In addition to the selected spectroscopically pure compounds PbS, As 2 S 3 Except that the mol ratio with AgI is different from that of Example 1 (see table 1 below), the rest of the preparation process, steps and process conditions thereof, etc. are all the same as in Example 1. The spectroscopically pure compounds used in Examples 1 to 3 and their amounts (mol), and the height / width ratio of small cylinders are listed in the following table 1:

[0027] Reality

apply

example

Selected spectroscopically pure compounds and their dosage

small cylinder

height and width

cm

Preface

No

PbS(mol)

As 2 S 3 (mol)

AgI (mol)

1

50

20

30

1

2

45

15

25

4

3

55

25

35

0.5

[0028] The selectivity principle of the all-solid-state Pb ion-selective electrode:

[0029] The Pb...

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Abstract

The solid Pb ion selecting electrode consists of resin tube, small resin tube bottom column of Pb ion sensitive material, copper wire and resin cover. The making process of the solid Pb ion selecting electrode includes the following steps: mixing spectroscopically pure PbS, As2S3 and AgI in certain molar ratio, grinding the mixture, forming, heating in dry nitrogen inside a quartz bottle at 550 deg.C for 3 hr; naturally annealing, grinding, forming small column, heating in a vacuum quartz bottle at 550 deg.C for 3 hr; naturally annealing, and polishing to prepare Pb 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 Pb ion selecting electrode. The electrode is portable and used in fast accurate detection of Pb ion in water, serum, vegetable, fruit, etc.

Description

technical field [0001] The invention belongs to an electrode used in the field of analysis, relates to an electrode used for detecting Pb ions, in particular to an all-solid-state Pb ion selective electrode for detecting Pb ions and a preparation method of the electrode. Background technique [0002] It is well known that heavy metal ions (such as Zn 2+ , Pb 2+ 、Cd 2+ 、Cu 2+ 、Cr 6+ , Mn 5+ 、As 3+ , Fe 3+ , Hg 2+ ) exceeding the standard can have harmful or even fatal effects on the human body. Therefore, 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. However, the equipment using these methods is huge, inconvenient to carry, expensive, requires complex pretreatment, long measurement cycle and requires skilled operators, which brings many difficulties and inconvenien...

Claims

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Application Information

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