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Device for concentrating extracting solution during organic phosphorus analysis in deposit sediments

A technology for extracting liquid and sediment, which is applied in the field of extracting liquid pretreatment device, which can solve the problems of small analysis sample volume and long time consumption, and achieve the effects of high concentration efficiency, easy operation, simple and portable structure

Inactive Publication Date: 2014-05-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

The traditional method of obtaining high-concentration sediment organic phosphorus solution is mainly to use a rotary evaporator to concentrate, but the ordinary rotary evaporator analyzes a small amount of sample and takes a long time. In the actual experiment process, an efficient and fast device is needed to obtain sediment organic phosphorus extraction. liquid

Method used

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  • Device for concentrating extracting solution during organic phosphorus analysis in deposit sediments
  • Device for concentrating extracting solution during organic phosphorus analysis in deposit sediments
  • Device for concentrating extracting solution during organic phosphorus analysis in deposit sediments

Examples

Experimental program
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Embodiment Construction

[0013] Embodiments of the invention:

[0014] 1 Comparative experiment of drying methods

[0015] (1) Sediment organic phosphorus extraction

[0016] The experiment took the sediments of Chaohu Lake as the research object, and weighed six 5g sediment samples (each three were used as repetitions for freeze-drying and rotary evaporation), and selected a ratio of 0.25M NaOH+50mM EDTA as the extractant, and the sediment and The ratio of extractant was 1:10 to extract organic phosphorus from sediments, and the sample was shaken at room temperature for 16 hours to conduct a comparative study of different concentration methods.

[0017] (2) Comparative study of different enrichment methods

[0018] The solutions obtained by shaking extraction were treated as follows: three extracts were concentrated by rotary evaporation; the other three extracts were transferred to the sample cold drying tube and frozen in a -20°C refrigerator for 5 hours. After the sample was completely frozen, ...

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Abstract

The invention discloses a device for concentrating an extracting solution during organic phosphorus analysis in deposit sediments. The device consists of a sample cold drying pipe, a cold drying pipe fixing device and a common refrigerated centrifuge and is simple in structure and convenient to operate. Because the sample cold drying pipe is used, a film covers an opening of the cold drying pipe, and a cold drying hole is formed in a pipe cover of the cold drying pipe, water is lost instead of solute in the process of performing freeze drying on a pre-frozen product. The cold drying pipe in the invention is small in volume (properly 50 ml), multiple samples can be treated by the fixing device every time, and the device is suitable for concentration analysis of lots of samples. The device is simple in structure and easy to operate, analysis of samples in batches can be performed, and the problem that the extracting solution cannot be concentrated during organic phosphorus analysis in deposit sediments in rivers and lakes is solved.

Description

Technical field: [0001] The invention relates to an extraction liquid pretreatment device for sediment organic phosphorus analysis, which can be used for freeze-drying treatment of NaOH-EDTA extraction liquid in sediment organic phosphorus analysis. Background technique: [0002] Organic phosphorus (Organic Phosphorus) is an important part of sediment phosphorus, accounting for 10-70% of total phosphorus in lake sediments. With the deepening of understanding, it is found that organic phosphorus plays an important role in the phosphorus cycle of aquatic ecosystems, and some organic phosphorus components can be converted into active phosphorus to be used by aquatic organisms. However, due to the complexity of organic phosphorus structure and the limitations of analysis methods and means, people's research and understanding of organic phosphorus in lake sediments is still not deep enough. NMR is a widely used analytical tool in modern science. It can analyze a variety of envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08G01N1/40
Inventor 单保庆张文强张洪唐文忠
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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