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Method for tracking loss of calcium ions in real time and in situ

A calcium ion, in situ technology, applied in the field of calcium ion loss tracking, can solve the problems of unclear calcium ion transport law in soil, calcium ion loss control, difficulty and other problems, and achieve a convenient and timely observation, rapid response, and simple overall design. Effect

Inactive Publication Date: 2016-05-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the detection methods of calcium ions mainly include spectrophotometry, atomic absorption method, etc., and these methods are mostly suitable for the detection of calcium ions in water samples, but the method of tracking the migration of calcium ions in soil in real time has not been reported, resulting in soil The law of calcium ion transport is unclear, and it is difficult to control calcium ion loss

Method used

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  • Method for tracking loss of calcium ions in real time and in situ

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment includes the following steps:

[0024] (1) Add 0.5g of white light perlite to a 25ml colorimetric tube;

[0025] (2) then add the 0.46mmol / L calcium carboxylic acid of 3mL and the 5mmol / L sodium hydroxide solution of 4mL in the colorimetric tube;

[0026] (3) the calcium chloride of 0.1g is added to the top of the medium again;

[0027] (4) The reaction product of calcium chloride and calcium carboxylic acid is wine red, and the color depth can represent the calcium ion concentration.

[0028] The soil color is dark, and the wine red color is difficult to observe in the soil, so white light perlite is used instead of soil as the medium.

Embodiment 2

[0030] This embodiment includes the following steps:

[0031] (1) Add 0.8g of white light perlite to a 25ml colorimetric tube;

[0032] (2) then add the 1.14mmol / L calcium carboxylic acid of 4mL and the 20mmol / L sodium hydroxide solution of 6mL in the colorimetric tube;

[0033] (3) the calcium chloride of 0.2g is added to the top of the medium again;

[0034] (4) The reaction product of calcium chloride and calcium carboxylic acid is wine red, and the color depth can represent the calcium ion concentration.

[0035] Other embodiments are the same as in Example 1.

Embodiment 3

[0037] This embodiment includes the following steps:

[0038] (1) Add 1.0g of white light perlite to a 25ml colorimetric tube;

[0039] (2) then add the 1.60mmol / L calcium carboxylic acid of 5mL and the 30mmol / L sodium hydroxide solution of 7mL in the colorimetric tube;

[0040] (3) the calcium chloride of 0.3g is added to the top of the medium again;

[0041] (4) The reaction product of calcium chloride and calcium carboxylic acid is wine red, and the color depth can represent the calcium ion concentration.

[0042] Other embodiments are the same as in Example 1.

[0043] like figure 1 Described, the implementation effect of embodiment 2 is shown as follows:

[0044] Among them: a is 0.8g perlite added with 4ml of 1.14mmol / L calcium carboxylic acid and 6mL of 20mmol / L sodium hydroxide solution; b-f: 0, 1, 2, 3 and 10 minutes after adding 0.2g calcium chloride.

[0045] from figure 1 It can be seen that with the addition of calcium chloride, the color of the solution gra...

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Abstract

The invention discloses a method for tracking loss of calcium ions in real time and in situ. The method comprises the following steps: adding a medium into a colorimetric tube; adding calconcarboxylic acid and a sodium hydroxide solution into the colorimetric tube; adding calcium chloride into the top of the medium; tracking the loss of the calcium ions according to the color change of reaction products of the calcium chloride and calconcarboxylic acid. According to the method, the calcium ions and calconcarboxylic acid can generate wine red substances through reaction, and the color can represent the concentration of the calcium ions, so that the method can be used for tracking the calcium migration process and the spatial and temporal distribution. Meanwhile, the integral design is simple and convenient; the reaction is quick, and change can be generated within shorter time, so that change is convenient to observe immediately.

Description

technical field [0001] The invention relates to a method for tracking calcium ion loss, in particular to a real-time in-situ tracking method for calcium ion loss. Background technique [0002] The total area of ​​acidic soil in my country is about 2.04×108hm 2 , accounting for about 21% of the country's arable land, and with the continuous expansion of my country's social and economic development, it has become one of the main obstacles to my country's agricultural development. According to research, the leaching loss of calcium ions is one of the causes of soil acidification. [0003] To control the loss of calcium ions, it is first necessary to establish a high-efficiency calcium ion detection technology. At present, the detection methods of calcium ions mainly include spectrophotometry, atomic absorption method, etc. These methods are mostly suitable for the detection of calcium ions in water samples, but the method of real-time in-situ tracking of calcium ions in soil ...

Claims

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Application Information

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IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 吴正岩王冬芳蔡冬清王敏周灵琳张桂龙吴丽芳
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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