Method for detecting organics attached to granule

A detection method and technology for organic matter, which are applied in measurement devices, preparation of test samples, instruments, etc., can solve the problem of not being able to truly reflect the total content of organic matter in water, and achieve the effect of optimizing the water treatment process.

Inactive Publication Date: 2009-07-29
HARBIN INST OF TECH
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing detection method only detects dissolved organic matter in wa

Method used

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  • Method for detecting organics attached to granule

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The detection method of the organic matter attached to the particles in this embodiment is as follows: 1. After mixing the suspended particles obtained by filtration through the microporous membrane and the extraction agent, ultrasonically extract for 25 minutes to 35 minutes to obtain the extract; 2. Under the condition of vacuum degree of 0.01MPa~0.1MPa, filter the extract obtained in step 1 with a glass fiber filter membrane with a diameter of 40mm~60mm, and then purge the filtered extract with nitrogen until the volume of the extract is 0.1mL~1.5 mL, stop purging with nitrogen, and then use an organic solvent to dilute the extract to 2mL; 3. Seal the distilled extract in a special bottle for gas chromatography, and then use high-flow helium as the carrier gas, and the flow rate of the carrier gas is 0.5~5mL / min, the inlet temperature is 250℃~300℃, the chromatographic column is HP5MS capillary column, and the gas chromatographic mass spectromete...

specific Embodiment approach 2

[0013] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of the suspended particles in step 1 to the extraction agent is 1 g: 8-13 mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of the suspended particles in step 1 to the extraction agent is 1 g: 5-10 mL. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for detecting organisms attached to particles, which relates to a method for detecting organisms in water. The method can solve the problems that the existing detection methods only detect dissolved organisms in water to fail to truly reflect the total content of organisms in water. The method comprises the following steps: firstly, suspended particles are mixed with an extractant, and the extract liquor is obtained after ultrasonic extraction; secondly, the filtered extract liquor is purged by nitrogen; thirdly, the extract liquor is added with an organic solvent to have constant volume of 2 mL; and fourthly, the constant-volume extract liquor is detected in a gas chromatography/mass spectrometer. The method can be used for detecting the content of organisms attached to particles in water, so as to have a full understanding of organic toxin pollution in water, help to analyze the problem of chlorination by-products (mostly attrached to particles) and truly reflect the total content of organisms in water. The method has great significance to get an in-depth understanding of the mechanism about the occurrence of organisms on particles, to optimize the water treatment process and to provide safe drinking water.

Description

technical field [0001] The invention relates to a method for detecting organic matter in water. Background technique [0002] With the rapid development of industry and agriculture in the world, water bodies are increasingly polluted by various organic substances. The analysis of organic substances usually uses gas phase or liquid chromatography instruments. When testing and analyzing organic substances, these instruments need to be filtered through a 0.45μm microfiltration membrane. , can be detected and analyzed by the detector, but the detection value of the water sample filtered by the filter membrane only indicates various indicators of dissolved organic matter in the water, and the organic matter attached to the particles is intercepted, which cannot truly reflect the total content of organic matter in the water . If it is possible to detect the content of organic matter on particles with a particle size greater than 0.45 μm above the microfiltration membrane, it will...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N1/34
Inventor 徐勇鹏崔福义郭妙春姜金鑫
Owner HARBIN INST OF TECH
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