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A kind of sodium cyanamide content assay method

A kind of technology of sodium cyanamide and determination method, applied in the directions of measuring devices, instruments, scientific instruments, etc., can solve the problem of inability to measure sodium cyanamide and the like

Active Publication Date: 2021-07-20
NINGXIA RUITAI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a method for determining the content of sodium cyanamide to solve the problem that sodium cyanamide cannot be determined

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  • A kind of sodium cyanamide content assay method
  • A kind of sodium cyanamide content assay method
  • A kind of sodium cyanamide content assay method

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Embodiment Construction

[0016] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0017] The embodiment of the present application has shown a kind of sodium cyanamide content determination method, and described method comprises:

[0018] At present, the preparation of carbendazim uses cyanamide as a raw material, and the intermediate is sodium cyanamide. The original chemical separation method cannot be used to meas...

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Abstract

The embodiment of the present application shows a method for determining the content of sodium cyanamide, the method comprising: Step 1: taking a sample; Step 2: connecting the chromatographic column to a liquid chromatograph, and setting the detection wavelength of the liquid chromatograph to 205nm, the mobile phase flow rate is 0.8mL / min, the mobile phase is ammonia water, the injection volume is 5.0μL, and the column temperature is 35°C; Step 3: Start the injection valve so that the mobile phase can bring the sample into the chromatographic column to realize cyanamide Separation of base sodium to finally determine the content of sodium cyanamide. In the present application, using ammonia water as mobile phase, the determination of sodium cyanamide content is stable and accurate.

Description

technical field [0001] The invention relates to the technical field of measuring sodium cyanamide, in particular to a method for determining the content of sodium cyanamide. Background technique [0002] In the original process, the intermediate of carbendazim is methyl cyanocarbamate, and the analysis method is the chemical separation method. Methyl cyanocarbamate exists in the aqueous solution in the form of calcium salt, calcium is quantitatively combined with EDTA, and the total is titrated with EDTA. Calcium, the total calcium content was measured; the chloride ion was titrated with silver nitrate, so as to measure the free calcium content in the sample; the total calcium content minus the free calcium content was the combined calcium content, so as to obtain the methyl cyanamide content. [0003] The preparation of carbendazim now uses cyanamide as a raw material, and the intermediate is sodium cyanamide, so it is impossible to measure the content of sodium cyanamide b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 王连之范长春李芬芬赵升榕张文琴
Owner NINGXIA RUITAI TECH
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