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Method for measuring content of sodium cyanamide

A technology for measuring sodium cyanamide and its method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as the inability to measure sodium cyanamide, and achieve stable and accurate sodium cyanamide content Effect

Active Publication Date: 2019-02-26
NINGXIA RUITAI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for measuring content of sodium cyanamide
  • Method for measuring content of sodium cyanamide
  • Method for measuring content of sodium cyanamide

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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

An embodiment of the invention provides a method for measuring content of sodium cyanamide. The method comprises steps as follows: step one, a sample is weighed; step two, a chromatographic column isconnected to a liquid chromatograph, detection wavelength of the liquid chromatograph is set to be 205 nm, flow velocity of moving phase is 0.8 mL / min, the moving phase is ammonium hydroxide, the sampling amount is 5.0 mu L, and column temperature is 35 DEG C; step three, an injection valve is started, the sample is taken into the chromatographic column by the moving phase, separation of sodium cyanamide is realized, and finally, the content of sodium cyanamide is determined. Ammonium hydroxide is taken as the moving phase, so that the measurement of the content of sodium cyanamide 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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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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