Method for simultaneously measuring iodine content and bromine content in soil

A technology of iodine content and bromine content, which is applied in the field of simultaneous determination of iodine content and bromine content in soil, can solve the problems of inability to measure at the same time, cumbersome operation process of ion chromatography, and long time-consuming determination, so as to achieve effective, reliable and time-consuming determination results The effect of less and lower detection limit

Inactive Publication Date: 2019-12-13
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the determination of bromine in soil, the current main method is ion chromatography, but the operation process of ion chromatography is cumbersome and the determination takes a long time
Although both bromine and iodine can be determined by Escal reagent semi-melt-ion chromatography, bromine and iodine are detected sequentially by using different detectors, and cannot be determined at the same time

Method used

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  • Method for simultaneously measuring iodine content and bromine content in soil
  • Method for simultaneously measuring iodine content and bromine content in soil
  • Method for simultaneously measuring iodine content and bromine content in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Two samples of common soil were collected respectively.

[0070] Make samples from two parts of soil collected according to the following operations: place the collected soil in a dry and ventilated air-drying room free of pollutants such as acid, alkali gas and dust, and dry it when the moisture content of the soil sample is 5-10%. When the time comes, crush the large pieces of soil (to prevent the sample from agglomerating after it is completely dried), and pick out the non-soil parts (such as animal and plant residues, stones and nodules, etc.), and then crush them, pass through a 200-mesh sieve, and collect The sample is obtained. The two soil samples are labeled as 1 # sample and 2 # sample.

[0071] Add 1.2g Na to a 10mL porcelain pot 2 CO 3 , weigh 0.5000g 1 # Add the sample into the porcelain sweet pot, stir well, and then cover with 0.8g Na 2 CO 3 , the rest of the steps are carried out according to the step (1) in the experiments such as the detection ...

Embodiment 2

[0075] Two samples of soil from the lead-zinc mining area were collected respectively.

[0076] The collected soil was processed in the same manner as in Example 1 to obtain samples. The two soil samples were labeled 3 # sample and 4 # sample.

[0077] Add 1.2g Na to a 10mL porcelain pot 2 CO 3 , weigh 0.5000g 3 # Add the sample into the porcelain sweet pot, stir well, and then cover with 0.8g Na 2 CO 3 , the rest of the steps are carried out according to the step (1) in the experiment such as the detection limit of the aforementioned content of the invention, a total of 6 parallel samples are made, and the control experiment is carried out according to the industry standard DZ / T 0279-2016 method. The results are shown in Table 5. Use the same method for 4 # The samples were tested and the results are shown in Table 5.

[0078] Table 5 Control experiment of samples in lead-zinc mining area

[0079]

Embodiment 3

[0081] Two samples of soil from the ion-type rare earth mining area were collected respectively.

[0082] The collected soil was processed in the same manner as in Example 1 to obtain samples. The two soil samples were labeled 5 # sample and 6 # sample.

[0083] Add 1.2g Na to a 10mL porcelain pot 2 CO 3 , Weigh 0.4000g 5 # Add the sample into the porcelain sweet pot, stir well, and then cover with 0.8g Na 2 CO 3 , the rest of the steps are carried out according to the step (1) in the experiment such as the detection limit of the aforementioned content of the invention, a total of 6 parallel samples are made, and the control experiment is carried out according to the industry standard DZ / T 0279-2016 method. The results are shown in Table 5. Use the same method for 6 # The samples were tested and the results are shown in Table 6.

[0084] Table 6 Control experiment of soil samples in ionic rare earth mining area

[0085]

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Abstract

The invention discloses a method for simultaneously measuring iodine content and bromine content in soil. According to the method comprises the following steps that: a sample and sodium carbonate areuniformly mixed, and then are covered with sodium carbonate again; the sample and the sodium carbonate are subjected to high temperature sample melting; a white substance in a content obtained throughsample melting is dissolved with water; water is added; so that the volume of an obtained mixture can be constant and reaches a certain volume; the mixture stands still, a supernatant is taken; an antioxidant can be added or not added; positive ion exchange resin is added, an obtained mixed solution is shaken up; water is added to dilute the solution; an obtained mixed solution is shaken up; thesolution is adopted as a to-be-measured solution; a blank solution and the to-be-measured solution are measured through ICP-MS, the mass concentrations of iodine and bromine in the blank solution andthe to-be-measured solution are obtained according to the working curves of iodine and bromine; and the mass concentrations are converted into the contents of iodine and bromine in the sample according to a formula. According to the method, a single sample melting reagent is adopted, so that reagent blank is controllable, and therefore, a determination result is more effective and reliable. The method provided by the invention has the advantages of high precision, high accuracy, lower detection limit and wide linear range, and meets the requirement of the simultaneous detection of iodine and bromine in soil samples in batches.

Description

technical field [0001] The invention relates to a method for measuring trace elements in soil, in particular to a method for simultaneously measuring iodine content and bromine content in soil. Background technique [0002] Iodine is one of the essential trace elements for humans and animals. It is widely distributed in nature, but its content is very low, which belongs to trace elements. Studies have shown that the effect of iodine on the human body is bidirectional. Iodine deficiency can lead to a series of physiological disorders and abnormal biological functions, affect growth and development, and cause a series of diseases, especially thyroid diseases; and excessive intake of iodine can lead to hypertrophy Iodine ground nail disease. When the content of iodine in the soil is high, it will have a toxic effect on plants. For example, the increase of iodine in the soil liquid of rice planting will cause special red blight of rice. Bromine widely exists in brine salts and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/28G01N27/626
CPCG01N27/62G01N1/28G01N2001/2893
Inventor 邱丽施意华唐碧玉古行乾蒙文飞郑弦阳兆鸿
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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