A kind of assay method of ammonium nitrogen content in urea ammonium nitrate solution
A technology of urea ammonium nitrate and ammonium nitrogen, which is applied in chemical analysis by titration method, can solve the problems of weak anti-interference ability, poor temperature resistance, long analysis process, etc., and achieve high accuracy and precision, anti-interference ability Enhancement, analysis and inspection of low-cost effects
Active Publication Date: 2018-03-02
柳州化工股份有限公司
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method has the characteristics of long time and high requirements on air tightness, and the result is poor temperature resistance.
[0005] The above method has defects such as many steps, long analysis process, weak anti-interference ability, and long analysis time (requiring 1.5 hours).
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] Embodiment 1: a kind of assay method of ammonium nitrogen content in urea ammonium nitrate solution, add neutral formaldehyde solution in urea ammonium nitrate solution, generate hexamethylenetetramine and the acid equivalent to ammonium salt content, in indication In the presence of the agent, titrate with sodium hydroxide to a pH value of 8.4 to 8.5 as the end point, and calculate the content of ammonium nitrogen.
[0023] Calculation formula: N%=
[0024] In the formula:
[0025] V 0 ——the volume of sodium hydroxide standard titration solution consumed for blank determination, mL;
[0026] V 1 - the volume of sodium hydroxide standard titration solution consumed by the determination of the sample, mL;
[0027] C—concentration of sodium hydroxide standard titration solution, mol / L;
[0028] m - the weight of the sample, g.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for determining the ammonium nitrogen content in a urea ammonium nitrate solution with the nitrogen content being 27.0-33.0%. A neutral formaldehyde solution is added into a urea ammonium nitrate solution, hexamethylenetetramine and acid equivalent to the ammonium salt content are generated, on the existence of an indicator, sodium hydroxide is used for titration to reach the pH value of 8.4-8.5 as an end point, and the content of ammonium nitrogen is worked out. By controlling the pH value and the titration speed, the reaction between CO(NH2)2 and HCHO can be effectively avoided, and therefore the result accuracy is ensured. Compared with an existing method, the steps are simplified, the method is easier and rapider, the analysis process is greatly shortened, the concomitant complex base body component, manual operation and other factor influences are avoided within the controllable range, the anti-interference capability of the method is enhanced, the accuracy and precision of the analysis result are high, and the analysis testing cost is quite low.
Description
technical field [0001] The invention relates to a method for determining the content of ammonium nitrogen in urea ammonium nitrate solution with a nitrogen content of 27% to 33%. Background technique [0002] Urea Ammonium Nitrate solution (Urea Ammonium Nitrate solution), referred to as UAN solution, also known as nitrogen solution (N solution) abroad, is prepared from urea, ammonium nitrate and water. The nitrogen contents are ammonium nitrogen, nitrate nitrogen and amide nitrogen respectively. [0003] Urea ammonium nitrate solution is a new liquid nitrogen fertilizer. It is a mixed solution of urea and ammonium nitrate. The content of urea and ammonium nitrate directly affects the content and ratio of ammonium nitrogen, nitrate nitrogen and amide nitrogen, and also directly affects To the effect of using liquid fertilizer. Because the liquid fertilizer contains both inorganic nitrogen and organic nitrogen, the results of accurate and rapid analysis of ammonium nitrogen...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 马松杰杨燕黄积候
Owner 柳州化工股份有限公司