Compound nitrogen protective agent as well as preparation method and application thereof

A compound nitrogen and protective agent technology, which is applied in the application, preparation of test samples, fertilizer mixture, etc., can solve the problems of nitrogen loss and other problems, and achieve the effect of excellent coefficient of variation, cost reduction, and good effect

Active Publication Date: 2014-04-23
SHENYANG JINLIJIE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a compound nitrogen protection agent and its preparation method and application, which solves the problem of nitrogen loss caused by the analysis and detection of soil, plants and various organic fertilizers in the prior art

Method used

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  • Compound nitrogen protective agent as well as preparation method and application thereof
  • Compound nitrogen protective agent as well as preparation method and application thereof
  • Compound nitrogen protective agent as well as preparation method and application thereof

Examples

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preparation example Construction

[0043] The preparation method of described compound nitrogen protection agent, comprises the steps:

[0044] (1) Take hydrochloric acid and add water at a volume ratio of 1:1 to prepare dilute hydrochloric acid, and dissolve quantitative Li, Sr, and Be in dilute hydrochloric acid;

[0045] (2) Heat to 40-60°C, keep warm for 20-40 minutes, then cool to room temperature;

[0046](3) Add acetic acid, heat to 60-80°C, keep warm for 20-40 minutes, then cool to room temperature;

[0047] (4) Add sulfuric acid and shake well;

[0048] (5) Add sodium chloride, mix evenly and store;

[0049] (6) The shelf life is six years.

[0050] Weigh 0.3000 g of the sample with a ten-thousandth balance, and place it in a Teflon-sealed digestion tube. Add nitrogen protection agent 0.2ml and shake well, the digestion solution uses: H 2 SO 4 ,3-5ml+HF,1-2ml+HClO 4 ,0.2-0.4ml, add H first 2 SO 4 , add HF, and finally add HClO 4 . Cover the Teflon-sealed digestion tube with the sealing cap, ...

Embodiment 1

[0067] The composite nitrogen protective agent of this embodiment, its composition and preparation process are as follows:

[0068] Hydrochloric acid HCl (concentration 37wt%) 10ml, acetic acid CH 3 COOH (concentration 99.8wt%) 100ml, sulfuric acid H 2 SO 4 (concentration 98wt%) 90ml, high-purity rare metals (concentration above 99.9wt%): lithium Li 2 mg, strontium Sr 3 mg, beryllium Be 4 mg; sodium chloride 1 g.

[0069] (1) Dissolve 2 mg of Li, 3 mg of Sr, and 4 mg of Be in 10 ml of hydrochloric acid with a concentration of 37 wt %;

[0070] (2) Heat to 50°C, keep warm for 30 minutes, then cool to room temperature;

[0071] (3) Add 900ml of acetic acid with a concentration of 99.8wt%, heat to 70°C, keep warm for 30 minutes, and cool to room temperature;

[0072] (4) Add 90ml of sulfuric acid with a concentration of 98wt%, and shake well;

[0073] (5) Add 1 gram of sodium chloride, mix evenly and store.

[0074] Such as figure 2 As shown, accurately weigh 0.3000g of t...

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Abstract

The invention relates to the fields of analyses of soil, plant and various organic fertilizers, and concretely relates to a compound nitrogen protective agent for analyzing soil, plant and organic fertilizers as well as preparation method and application thereof. The invention can solve the nitrogen loss problem caused by analyses and detections of soil, plant and various organic fertilizers in prior art. The compound nitrogen protective agent comprises the following components according to the ratio: 5-15 ml of hydrochloric acid HCL (concentration: 37 wt%), 80-120 ml of acetic acid CH3COOH (concentration: 99.8 wt%), 400-500 ml of sulfuric acid H2SO4 (concentration: 98 wt%) and high purity rare metals (concentration: higher than 99.9 wt%): 1-3 mg of lithium, 2-4 mg of strontium, 3-5 mg of beryllium and 1-2 mg of sodium chloride. The invention 'nitrogen protective agent' solves the problem of nitrogen loss during the process of sample digestion at home and abroad, that is under the condition: 195+ / -2 DEG C, 600 W, 2-4 hours, 0.8 kg / cm<2> pressure, only 0.2 ml of nitrogen protective agent is added into 0.3000 g of sample for completing sample digestion with good effect and without nitrogen loss.

Description

technical field [0001] The invention relates to the field of analysis of soil, plants and various organic fertilizers, in particular to a compound nitrogen protectant for the analysis of soil, plants and organic fertilizers and its preparation method and application. Background technique [0002] In 1883, British scholar Kiedhl et al successively established a method for analyzing the total amount of N, P, and K in soil, plants, and organic fertilizers. The sample processing (digestion or melting) has hardly changed in 130 years. in: [0003] The full amount of nitrogen (N) is still at a high temperature of 380 ° C, with H 2 SO 4 Digestion, about 8 hours, glass equipment, equipment 0.5-7 million; [0004] Total phosphorus (P), Na 2 CO 3 Melting sample 920, several platinum dishes, 5 hours, equipment 150,000-200,000; [0005] Total potassium (K) NaOH melting sample 720, several silver dishes, 5 hours, equipment 100,000-150,000; [0006] The above method needs to proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00G01N1/44
Inventor 贾玉杰卢明远陆晓光黄进
Owner SHENYANG JINLIJIE TECH
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