Method for fast detecting total nitrogen content in fertilizer

A detection method, a technology of nitrogen content, applied in the direction of material analysis, preparation of test samples, measurement of color/spectral characteristics, etc. by observing the influence of chemical indicators, it can solve the cumbersome detection steps, which can only be used in laboratories, etc. problem, achieving high sensitivity and good correlation

Inactive Publication Date: 2008-04-02
汤新华
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiency that the total nitrogen of chemical fertilizers can only be detected in the laboratory, after complex and high-temperature samp...

Method used

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described below.

[0024] This implementation mode provides a rapid detection method for the total nitrogen content of chemical fertilizers, mainly for industrial and commercial departments, agricultural departments, and quality and technical supervision bureaus to conduct rapid quantitative or semi-quantitative detection of chemical fertilizer quality on site, and realize rapid on-site law enforcement. The detection results achieved by the sample processing and detection methods of the reagents in this method have a good correlation with the national standard method, and the combined instrument error is within ± 1%, and compared with the color card for visual inspection, the error is within ± 1.5%.

[0025] The detection method mainly includes the following parts.

[0026] 1. Preparation of standard contrast solution

[0027] Prepare several parts of pure urea solutions, several parts of pure ammonium chloride solu...

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Abstract

A quick detection method for total nitrogen content of fertilizer mainly includes the following steps: firstly, different standard contrasting solutions which are respectively corresponding to different nitrogen contents are prepared; secondly, sample contrasting solution is prepared and content of nitrogen in each form can be judged through contrasting the sample contrasting solution and each standard contrasting solution. The invention which can realize quick, simplified and highly sensitive detection is suitable for on-site quick determination by unprofessional staff; moreover, the invention can be used in on-site quick quantitative or semiquantitative detection of fertilizer quality by industrial and commercial authority, agricultural authority and quality and technical supervision administration, thereby realizing on-site quick law enforcement; meanwhile, the detection result realized by sample treatment and detection method of reagent is in excellent correlativity with national standard method; in addition, when instrument error is within +-1 percent, the error of visual examination during contrasting with a color card is within +-1.5 percent.

Description

technical field [0001] The invention relates to a chemical fertilizer detection method, in particular to a rapid detection method for the total nitrogen content of chemical fertilizers. Background technique [0002] At present, the quality inspection of chemical fertilizers in China is mainly undertaken by provincial quality and technical supervision bureaus, and in some places by municipal quality and technical supervision bureaus, and the detection methods adopted by the above professional departments have always been the national standard methods formulated by my country in the 1980s. The detection time of the method is far from meeting the actual monitoring needs. Generally, it takes about 15 days from sampling to reporting. However, the characteristics of chemical fertilizers in the field of circulation have obvious time constraints: after the products arrive at the dealer, they will be released soon. Wholesale to rural retailers, and may be purchased by farmers and appli...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/25G01N1/28
Inventor 汤新华
Owner 汤新华
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