CN102243181A - Method for detecting ammonia value of powdered anticaking agent - Google Patents
Method for detecting ammonia value of powdered anticaking agent Download PDFInfo
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- CN102243181A CN102243181A CN2011100878493A CN201110087849A CN102243181A CN 102243181 A CN102243181 A CN 102243181A CN 2011100878493 A CN2011100878493 A CN 2011100878493A CN 201110087849 A CN201110087849 A CN 201110087849A CN 102243181 A CN102243181 A CN 102243181A
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Abstract
The invention relates to a method for detecting an ammonia value of a powdered anticaking agent. The method comprises the following steps of: weighing m grams of powdered anticaking agent, and adding the powdered anticaking agent into a conical flask; adding absolute ethanol; heating for boiling; filtering the solution when the solution is hot; extracting lower filtrate; adding 3 droplets of 10g/L bromcresol green indicator into the filtrate; titrating the filtrate by using a 0.05mol/L standard hydrochloric acid-isopropanol solution until the solution changes from dark blue to yellow; recording the consumed volume of hydrochloric acid-isopropanol; and calculating the ammonia value of the powdered anticaking agent according to the consumed volume of the hydrochloric acid-isopropanol. The method is suitable for analyzing ammonia values of various powdered anticaking agents, and has the characteristics of reducing color errors, calculation errors, experimental errors and the like.
Description
Technical field
The present invention relates to a kind of powder anti-caking agent ammonia values determination method.
Background technology
Along with the increase of fertilizer anti-caking agent demand, the kind of anti-caking agent is also progressively increasing, and the anti-caking agent of using at present mainly contains three kinds of paste, oily and powderies.According to the improvement of the market demand and fertilizer production technology, the use amount of powder anti-caking agent is increasing, but its best powder anti-caking agent used in amounts wants certain technical indicator to instruct at different fertilizer the time, and wherein its ammonia value is an indispensable index.
Just, dense because of the color of its powder itself at present at the analytical approach of paste and liquid anti-caking agent, cover the indicator color during titration easily, cause the inaccurate of analysis result, this anti-caking agent of impact evaluation is to the anti-caking effect of fertilizer.
Summary of the invention
Purpose of the present invention is in order to overcome defective and the problem that above-mentioned prior art exists, and a kind of powder anti-caking agent ammonia values determination method is provided, and method provided by the invention goes for the analysis of various powder anti-caking agent ammonia values.Compare with existing paste and liquid anti-caking agent ammonia value analytical approach, have characteristics such as the color error of reduction, the error of calculation, experimental error.
The present invention realizes by following technology:
A kind of powder anti-caking agent ammonia values determination method, it is characterized in that carrying out according to the following steps: the agent of weighing m g powder anti-caking places 250 milliliters of conical flasks, m≤6; Adding 80-100 milliliter absolute ethyl alcohol also boils, use this solution of Φ 15cm fast qualitative filter paper filtering while hot, to be filtered fully after, take off metafiltration liquid, the bromcresol green indicator that adds 3 10g/L in filtrate becomes yellow until solution by mazarine, the volume V of record hydrochloric acid-isopropyl alcohol consumption with standard hydrochloric acid-this filtrate of aqueous isopropanol titration of Cmol/L, ammonia value computing formula=C * V * 56.1/m, wherein the unit of ammonia value is mgKOH/g; Wherein C is not the volumetric molar concentration of hydrochloric acid-isopropyl alcohol, and unit is mol/L; V consumes hydrochloric acid-isopropyl alcohol to consume volume, and unit is a milliliter; 56.1 be the molal weight of potassium hydroxide, unit is g/mol; M is the quality of powder anti-caking agent, and unit is gram.
The preparation method of described hydrochloric acid-isopropyl alcohol is: measure 4.5 milliliters of mass concentrations and be 38% concentrated hydrochloric acid and place 1000 milliliters volumetric flask, be settled to hydrochloric acid-isopropyl alcohol standard solution that 1000 milliliters of scale marks are 0.05mol/L with anhydrous isopropyl alcohol.
Described bromcresol green indicator preparation method is: take by weighing 1 gram bromcresol green indicator powder, incorporate the bromcresol green indicator that fully dissolves the standby 10g/L of being in back in 100 ml distilled waters.
Described absolute ethyl alcohol is to buy on the market.
Described anhydrous isopropyl alcohol and concentrated hydrochloric acid all are to buy on the market.
Method of the present invention goes for the analysis of various powder anti-caking agent ammonia value.Compare with existing paste anti-caking agent ammonia value analytical approach, have characteristics such as the color error of reduction, the error of calculation, experimental error.
Method provided by the invention, compared to gravimetric method, it is extensive that it mainly analyzes raw material sources, simple to operate, and required time is short, has improved analysis efficiency, and experimental error is little, has guaranteed the reliability of analysis result
Embodiment
The invention will be further described below in conjunction with embodiment, but do not limit the present invention.
Embodiment 1: take by weighing 3.6069 gram powder anti-caking agent and place 250 milliliters of conical flasks, add 80 milliliters of absolute ethyl alcohols and boil, use this solution of Φ 15cm fast qualitative filter paper filtering while hot, to be filtered fully after, take off metafiltration liquid, the bromcresol green indicator that in filtrate, adds 3 10g/L, standard hydrochloric acid-this filtrate of aqueous isopropanol titration with 0.05mol/L becomes yellow until solution by mazarine, the volume of record hydrochloric acid-isopropyl alcohol consumption is 1.71 milliliters, according to hydrochloric acid-isopropyl alcohol concentration and consumption volume, can calculate this anti-caking agent ammonia value is 1.33.Error is 0.15, and experimental result is in the error allowed band.
Embodiment 2: take by weighing 4.5704 gram powder anti-caking agent and place 250 milliliters of conical flasks, add 80 milliliters of absolute ethyl alcohols and boil, treat this solution with Φ 15cm fast qualitative filter paper filtering while hot, to be filtered fully after, it is standby to take off metafiltration liquid, the bromcresol green indicator that adds 3 10g/L in filtrate becomes yellow until solution by mazarine with standard hydrochloric acid-this filtrate of aqueous isopropanol titration of 0.05mol/L, and the volume that writes down hydrochloric acid-isopropyl alcohol consumption is 1.76 milliliters.According to hydrochloric acid-isopropyl alcohol concentration and consumption volume, can calculate this anti-caking agent ammonia value is 1.08.Error is 0.1, and experimental result is in the error allowed band.
Embodiment 3: take by weighing 5.7358 gram powder anti-caking agent and place 250 milliliters of conical flasks, add 80 milliliters of absolute ethyl alcohols and boil, treat this solution with Φ 15cm fast qualitative filter paper filtering while hot, to be filtered fully after, it is standby to take off metafiltration liquid, the bromcresol green indicator that adds 3 10g/L in filtrate becomes yellow until solution by mazarine with standard hydrochloric acid-this filtrate of aqueous isopropanol titration of 0.05mol/L, and the volume that writes down hydrochloric acid-isopropyl alcohol consumption is 2.45 milliliters.According to hydrochloric acid-isopropyl alcohol concentration and consumption volume, can calculate this anti-caking agent ammonia value is 1.20.Error is 0.02, and experimental result is in the error allowed band.
Embodiment 4: take by weighing 5.0464 gram powder anti-caking agent and place 250 milliliters of conical flasks, add 80 milliliters of absolute ethyl alcohols and boil, treat this solution with Φ 15cm fast qualitative filter paper filtering while hot, to be filtered fully after, it is standby to take off metafiltration liquid, the bromcresol green indicator that adds 3 10g/L in filtrate becomes yellow until solution by mazarine with standard hydrochloric acid-this filtrate of aqueous isopropanol titration of 0.05mol/L, and the volume that writes down hydrochloric acid-isopropyl alcohol consumption is 1.89 milliliters.According to hydrochloric acid-isopropyl alcohol concentration and consumption volume, can calculate this anti-caking agent ammonia value is 1.05.Error is 0.13, and experimental result is in the error allowed band.
Claims (1)
1. powder anti-caking agent ammonia values determination method, it is characterized in that carrying out according to the following steps: the agent of weighing m g powder anti-caking places 250 milliliters of conical flasks, m≤6; Adding 80-100 milliliter absolute ethyl alcohol also boils, this solution of filtered while hot, to be filtered fully after, take off metafiltration liquid, the bromcresol green indicator that in filtrate, adds 3 10g/L, standard hydrochloric acid-this filtrate of aqueous isopropanol titration with Cmol/L becomes yellow until solution by mazarine, the volume V that record hydrochloric acid-isopropyl alcohol consumes; Ammonia value computing formula=C * V * 56.1/m, wherein the unit of ammonia value is mgKH/g; Wherein C is not the volumetric molar concentration of hydrochloric acid-isopropyl alcohol, and unit is mol/L; V consumes hydrochloric acid-isopropyl alcohol to consume volume, and unit is a milliliter; 56.1 be the molal weight of potassium hydroxide, unit is g/mol; M is the quality of powder anti-caking agent, and unit is gram.
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| CN2011100878493A CN102243181A (en) | 2011-04-08 | 2011-04-08 | Method for detecting ammonia value of powdered anticaking agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093290A (en) * | 2016-07-27 | 2016-11-09 | 湖北富邦科技股份有限公司 | A kind of qualitative determination method that anti-caking agent dispensing is the most correct |
| CN107367508A (en) * | 2017-06-22 | 2017-11-21 | 湖北富邦科技股份有限公司 | A kind of whether correct qualitative determination method of nitro-compound fertilizer oil body anti-caking agent dispensing |
| CN109856315A (en) * | 2018-12-17 | 2019-06-07 | 刘洪河 | The detection method of free amine content in a kind of NMP |
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| WO2010024385A1 (en) * | 2008-08-29 | 2010-03-04 | 石原産業株式会社 | Metallic copper dispersion, process for producing the metallic copper dispersion, electrode, wiring pattern, and coating film formed using the metallic copper dispersion, decorative article and antimicrobial article with the coating film formed thereon, and processes for producing the decorative article and the antimicrobial article |
| WO2010102438A1 (en) * | 2009-03-09 | 2010-09-16 | Wang Yi | Screw-shaped led |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093290A (en) * | 2016-07-27 | 2016-11-09 | 湖北富邦科技股份有限公司 | A kind of qualitative determination method that anti-caking agent dispensing is the most correct |
| CN107367508A (en) * | 2017-06-22 | 2017-11-21 | 湖北富邦科技股份有限公司 | A kind of whether correct qualitative determination method of nitro-compound fertilizer oil body anti-caking agent dispensing |
| CN109856315A (en) * | 2018-12-17 | 2019-06-07 | 刘洪河 | The detection method of free amine content in a kind of NMP |
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Application publication date: 20111116 |