Method for measuring insoluble substances in sodium humate

A technology of sodium humate and a determination method, which is applied in the field of chemical experiment detection, can solve the problems of not taking into account the adsorption of sodium humate to filter paper, the detection result is not very accurate and stable, and the detection time is prolonged, and the detection time is shortened, Efficiency improvement and water consumption reduction effects

Inactive Publication Date: 2019-09-17
SHANDONG NEW HOPE LIUHE GROUP +1
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Problems solved by technology

In the existing standard, the determination of water-insoluble matter is filtered with medium-speed quantitative filter paper, and then washed with water. The adsorption of sodium humate to the filter paper is not considered. During the washing process, sodium humate is adsorbed on the filter paper, and the filtration is very slow. Wash with water It takes several hours until the filtrate is colorless, resulting in prolonged detection time, and the result is not very accurate and stable.

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  • Method for measuring insoluble substances in sodium humate
  • Method for measuring insoluble substances in sodium humate
  • Method for measuring insoluble substances in sodium humate

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Embodiment 1

[0021] A kind of assay method of water-insoluble matter in sodium humate, is characterized in that, described assay method comprises the following steps:

[0022] S1. Extraction of water-insoluble matter: Take 1.0g of sodium humate sample and weigh it accurately, put the sodium humate sample into a 250mL conical flask, add 70mL water accurately, place the conical flask in a constant temperature water bath, and Heat in a boiling water bath for 30 minutes, take out the Erlenmeyer flask and cool it to room temperature, then completely transfer the test solution and insoluble matter in the Erlenmeyer flask into a centrifuge tube, put the centrifuge tube into a centrifuge, centrifuge for 5 minutes, take out the centrifuge tube and immediately turn the centrifuge tube upside down to pour out all the solution to obtain a water-insoluble substance;

[0023] S2. Suction filtration: Dry the nylon filter cloth and weighing bottle in a drying oven at 110°C±2°C for 30 minutes in advance, w...

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Abstract

The invention provides a method for measuring insoluble substances in sodium humate, and belongs to the field of chemical experiment detection. According to the technical scheme, the method comprises the following steps: S1, extracting the insoluble substances; S2, carrying out suction filtration; S3, carrying out weighing; and S4, calculating a result. The method has the beneficial effects that nylon filter cloth is adopted, so that the sodium humate is not adsorbed on the nylon filter cloth, and only the water insoluble substances are left on the filter cloth; and the filtration is changed into the suction filtration, so that the water consumption is reduced, the detection time is shortened, the efficiency is improved, and the detection result is accurate and stable.

Description

technical field [0001] The invention relates to the field of chemical experiment detection, in particular to a method for measuring water-insoluble substances in sodium humate. Background technique [0002] In the existing standard, the water-insoluble substance determination step describes washing the insoluble substance with water until the filtrate is colorless, without considering the characteristics of sodium humate. Sodium humate is a macromolecular organic weak acid sodium salt with multiple functions. Its structure is relatively complex, and it has colloidal properties and adsorption capacity. In the existing standard, the determination of water-insoluble matter is filtered with medium-speed quantitative filter paper, and then washed with water. The adsorption of sodium humate to the filter paper is not considered. During the washing process, sodium humate is adsorbed on the filter paper, and the filtration is very slow. Wash with water It will take several hours un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N1/34G01N1/44
CPCG01N1/34G01N1/44G01N5/04
Inventor 石琴琴张敏曹伟刘璐孙春华郭吉原
Owner SHANDONG NEW HOPE LIUHE GROUP
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