Novel nessler's reagent and method for rapidly measuring soil ammonium nitrogen

A reagent, Nestle's technology, applied in the field of laboratory analysis, can solve problems such as narrow linear range, non-sedimentation, strict pH requirements, etc., to achieve the effects of slowing down the chemical reaction speed, stabilizing the reaction products, and eliminating measurement errors

Inactive Publication Date: 2008-12-10
河南农大迅捷测试技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional analysis method of ammonium nitrogen is relatively accurate, but there are some insurmountable deficiencies in practical applications, especially in rural grassroots or mobile services: the reaction system has strict requirements on pH, narrow linear range, etc.
However, the success rate of preparing Nessler's reagent according to the above method is low, and it is very

Method used

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  • Novel nessler's reagent and method for rapidly measuring soil ammonium nitrogen
  • Novel nessler's reagent and method for rapidly measuring soil ammonium nitrogen
  • Novel nessler's reagent and method for rapidly measuring soil ammonium nitrogen

Examples

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Effect test

Embodiment 1

[0030] Embodiment 1 A kind of novel Nessler's reagent is the aqueous solution that is formulated with chemical reagents including potassium iodide, mercuric chloride, potassium hydroxide or sodium hydroxide, and is formulated as follows:

[0031] Take 50.0g of potassium iodide, dissolve it in 50mL of water, add saturated mercuric chloride solution while stirring, until the small amount of brick-red precipitate that appears is still insoluble after being fully stirred, then slowly add 150.0g of solid potassium hydroxide, and stir to make It fully reacted, diluted with water to 1000mL, airtight and allowed to stand for 12 hours, and the supernatant was divided into small dropper bottles for later use.

[0032] The method for quick determination of soil ammonium nitrogen using the above-mentioned Nessler reagent is as follows:

[0033] (1) Reagent preparation

[0034] ①The masking agent weighs potassium sodium tartrate (KNaC 4 h 4 o 6 4H 2 O) 400.0g, dissolved in about 700mL...

Embodiment 2

[0042] Embodiment 2 A kind of novel Nessler's reagent is formulated as follows:

[0043] Take 55.0g of potassium iodide, dissolve it in 60mL of water, add saturated mercuric chloride solution while stirring, until a small amount of brick-red precipitate that appears is still insoluble after being fully stirred, then slowly add 115.0g of sodium hydroxide, and stir to make it Fully react, add water to make up to 1000mL, seal and let stand for 15 hours, take the supernatant and serve. The method for quickly measuring soil ammonium nitrogen using the Nessler reagent is as follows:

[0044] (1) Reagent preparation

[0045] ①The masking agent weighs potassium sodium tartrate (KNaC 4 h 4 o 6 4H 2 (2) 500.0g, dissolved in 800mL water (can be heated to help dissolve); another 25.0g of sodium hydroxide was weighed, dissolved in 150mL water, cooled slightly, added to potassium sodium tartrate solution, diluted to 1000mL with water, shaken;

[0046] ②Weigh 45.0g of gum arabic powder...

Embodiment 3

[0054] Embodiment 3 A kind of novel Nessler's reagent is formulated as follows:

[0055] Take 45.0g of potassium iodide, dissolve it in 40mL of water, add saturated mercuric chloride solution while stirring, until the small amount of brick-red precipitate that appears is still insoluble after being fully stirred, then slowly add 140.0g of sodium hydroxide, and stir to make it Fully react, add water to make up to 1000mL, seal and let stand for 20 hours, take the supernatant and serve. The method for quickly measuring soil ammonium nitrogen using the Nessler reagent is as follows:

[0056] (1) Reagent preparation

[0057] ① Masking agent Weigh 350.0g potassium sodium tartrate, dissolve it in 600mL water; weigh another 15.0g sodium hydroxide, dissolve it in 85mL water, add it into the potassium sodium tartrate solution after cooling, dilute with water to 1000mL, and shake well;

[0058] ②Color aid Weigh 55.0g of gum arabic powder, dissolve in 400mL of boiling water, dilute to 1...

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Abstract

The invention discloses a novel Nyquist reagent and a method using the reagent for rapidly determining soil ammonium. The main improvement of the novel Nyquist reagent lies in that proper amount of solid potassium hydroxide or sodium hydroxide is directly added in solution after the complete reaction of potassium iodide and mercuric chloride during the preparation; the novel Nyquist reagent is used for determining the soil ammonium; tartaric acid potassium sodium alkaline solution is used as masking agent, the novel Nyquist reagent is added in Arabic gum medium solution for the color reaction with ammonium ions. Alkaline is added for adjusting the alkalinity of a color reaction system for the colorimetric determination after the color is stable. The Nyquist reagent has the advantages of wide linear range, long shelf life, color stability and easy preparation. The determination method of the invention has the advantages of easy operation, good reproducibility, small error and rapid test speed and is applied to bases and agricultural extension departments.

Description

technical field [0001] The invention relates to the field of laboratory analysis, in particular to a novel Nessler reagent and a method for rapidly measuring soil ammonium nitrogen by using it as a color developing agent. Background technique [0002] Ammonium nitrogen in the soil is the main source of nitrogen uptake by most crops. When the content of ammonium nitrogen in the soil is insufficient, it will affect the normal growth and development of crops; on the contrary, if the content of ammonium nitrogen in the soil is too high, it will be absorbed by crops and cause poisoning. In some irrigated areas, the content of ammonium nitrogen in the soil is too high, which may cause pollution to water bodies. Therefore, the determination of ammonium nitrogen is of great significance in soil nutrient testing. The conventional analysis method of ammonium nitrogen is relatively accurate, but there are some insurmountable deficiencies in practical application, especially in rural ...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 段铁城贾玮杨素勤赵玉正张广俊郑隆凯李伟华胡建东
Owner 河南农大迅捷测试技术有限公司
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