Rapid preprocessing method for measuring total phosphorus content in deposit

A pretreatment, phosphorus content technology, applied in the preparation of test samples, material analysis by observing the effect on chemical indicators, and analysis by chemical reaction of materials, etc., can solve the cumbersome operation, heavy workload, Problems such as long measurement time, to achieve the effect of simple experimental conditions, safe experimental process, and easy portability

Inactive Publication Date: 2008-08-27
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The traditional pretreatment method has disadvantages such as long measurement time, complicated pretreatment process, expensive experimental equipment, cumbersome operation, more samples are required for analysis, and heavy workload, so it cannot meet the needs of on-site emergency monitoring, nor is it suitable for ma...

Method used

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  • Rapid preprocessing method for measuring total phosphorus content in deposit
  • Rapid preprocessing method for measuring total phosphorus content in deposit
  • Rapid preprocessing method for measuring total phosphorus content in deposit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Sediment samples collected from the coastal waters of Jiangsu were determined by the sulfuric acid perchloric acid digestion method (hereinafter referred to as the traditional method) and this method respectively.

[0038] main reagent

[0039] Potassium persulfate solution 20g / L, ammonium molybdate antimony stock solution: Take 194.6mL concentrated sulfuric acid and add it to 405mL distilled water to cool, dissolve 20g ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] in 300mL distilled water, under constant stirring, slowly pour the sulfuric acid solution into the ammonium molybdate solution, add 100mL5g / L potassium antimony tartrate solution and mix well (dissolve 0.5g potassium antimony tartrate [K(SbO) C 4 h 4 o 6 1 / 2H 2 O] in 100mL water). The reagent is stored in a brown glass bottle in a cold place and is stable for at least 2 months. Chromogenic agent: Weigh 1.5g of ascorbic acid, add it to 100ml of stock solution, stir with electric power, and prepare i...

Embodiment 2

[0045] Soil samples collected from the banks of the Jiangsu section of the Yangtze River were determined by the sulfuric acid perchloric acid digestion method (hereinafter referred to as the traditional method) and this method respectively.

[0046] main reagent

[0047] Potassium persulfate solution 25g / L, ammonium molybdate antimony stock solution: Take 194.6mL concentrated sulfuric acid and add it to 405mL distilled water to cool, dissolve 20g ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] in 300mL distilled water, under constant stirring, slowly pour the sulfuric acid solution into the ammonium molybdate solution, add 100mL5g / L potassium antimony tartrate solution and mix well (dissolve 0.5g potassium antimony tartrate [K(SbO) C 4 h 4 o 6 1 / 2H 2 O] in 100mL water). The reagent is stored in a brown glass bottle in a cold place and is stable for at least 2 months. Chromogenic agent: Weigh 1.5g of ascorbic acid, add it to 100ml of stock solution, stir with electric ...

Embodiment 3

[0053] Soil samples collected from a paddy field in Yangzhou City, Jiangsu Province were determined by sulfuric acid perchloric acid digestion method (hereinafter referred to as the traditional method) and this method respectively.

[0054] main reagent

[0055] Potassium persulfate solution 30g / L, ammonium molybdate antimony stock solution: Take 194.6mL concentrated sulfuric acid and add it to 405mL distilled water to cool, dissolve 20g ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] in 300mL distilled water, under constant stirring, slowly pour the sulfuric acid solution into the ammonium molybdate solution, add 100mL5g / L potassium antimony tartrate solution and mix well (dissolve 0.5g potassium antimony tartrate [K(SbO) C 4 h 4 o 6 1 / 2H 2 O] in 100mL water). The reagent is stored in a brown glass bottle in a cold place and is stable for at least 2 months. Chromogenic agent: Weigh 1.5g of ascorbic acid, add it to 100ml of stock solution, stir with electric power, an...

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Abstract

The invention discloses a quick pretreatment method for measuring the total phosphorus content in sediments, belonging to the environmental monitoring technical field. The invention comprises the following steps: A. pretreatment of a soil sample: the soil sample is weighed, dried to the constant weight, taken out, cooled and grinded to over 60 meshes under drying conditions, weighed and then transferred into a slaking pipe; B. slaking pretreatment: distilled water and potassium persulphate solution are added and placed into a slaking hole of a COD slaking instrument, and simultaneously blank solution is taken and processed together with a sample to be detected with the same method; C. slaking; D. filtration: after slaking is finished, the sample in the slaking pipe is leached out by the distilled water, filtered to a container by a filter paper or a filter membrane, diluted, colored and finally measured and calculated according to the general spectrophotography. Compared with the prior pretreatment method, the quick pretreatment method for measuring the total phosphorus content in the sediments has the advantages of quick measurement, few equipment used, low energy consumption, simple experimental conditions, easy carryover of experimental equipment, suitability for on-scene monitoring, and safe experimental process.

Description

technical field [0001] The invention relates to a rapid pretreatment method for determining the total phosphorus content in sediments. Background technique [0002] Total phosphorus is one of the most basic indicators for analyzing sediment samples in environmental monitoring, and is widely used in agricultural and soil science research. With the development of our country's social economy, the soil pollution caused by industrial and agricultural production continues to intensify. With the flow of precipitation, surface water and groundwater, the phosphorus in the soil will migrate to the adjacent water body, causing non-point source pollution, causing and aggravating the eutrophication of the water body, and depositing and continuing to release phosphorus in the water body, becoming the phosphorus in the water body environment. An important source of elements. Therefore, in order to grasp the degree and distribution of soil pollution, study the temporal and spatial distri...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N1/28
Inventor 任洪强耿金菊洪宇宁丁丽丽叶昌盛
Owner NANJING UNIV
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