阅读说明：本技术 一种快速检测硝酸根和亚硝酸根的比色膏的制备方法 (Preparation method of colorimetric paste for rapidly detecting nitrate and nitrite ) 是由 祖佰祎 刘勇 窦新存 于 2019-11-28 设计创作，主要内容包括：发明涉及一种快速检测硝酸根和亚硝酸根的比色膏的制备方法,该方法是由快速检测硝酸根和亚硝酸根的比色试剂、辅助添加剂为吐温-20、吐温-40、吐温-60或吐温-80混合均匀制成,通过本发明所述方法获得的快速检测硝酸根和亚硝酸根的比色膏性状为略灰色黏稠油状物质,膏体外有光泽,可以均匀涂布,与爆炸物接触时,能够迅速进行试剂释放,迅速达到裸眼识别,从而实现快速检测硝酸根和亚硝酸根的目的。具有载试剂量大,操作简单,体积小,携带方便,便于贮存,现场快速准确,容易识别,灵敏度高,检测限低,利于应用推广,可为安全部门现场检测分析爆炸物提供有效的技术手段。(The invention relates to a method for preparing colorimetric paste for rapidly detecting nitrate and nitrite, which is prepared by uniformly mixing a colorimetric reagent for rapidly detecting nitrate and nitrite and an auxiliary additive of Tween-20, Tween-40, Tween-60 or Tween-80. The device has the advantages of large reagent carrying amount, simple operation, small volume, convenient carrying, convenient storage, quick and accurate site, easy identification, high sensitivity, low detection limit, contribution to application and popularization and capability of providing an effective technical means for the site detection and analysis of explosives by safety departments.)

1. A preparation method of colorimetric paste for rapidly detecting nitrate and nitrite is characterized in that the method is prepared by uniformly mixing colorimetric reagent for rapidly detecting nitrate and nitrite and auxiliary additives of Tween-20, Tween-40, Tween-60 or Tween-80, and the specific operation is carried out according to the following steps:

mixing colorimetric reagent for rapidly detecting nitrate and nitrite with Tween-20, Tween-40, Tween-60 or Tween-80 at a volume ratio of 10:1-6, placing into an ultrasonic cleaning instrument, performing ultrasonic treatment until the solution becomes viscous or pasty, and sealing and storing to obtain colorimetric paste for rapidly detecting nitrate and nitrite.

Technical Field

The invention belongs to the field of non-standard explosive detection, and particularly relates to colorimetric paste for rapidly detecting nitrate and nitrite.

Background

At present, the technologies for detecting nitrate and nitrite include ion migration (Talanta,2001,54, 515-. However, the colorimetric reagent for rapidly detecting nitrate and nitrite of patent application No. 201811000105.1 is inconvenient to carry, transport and store because it is a liquid and contains a large amount of perchloric acid, hydroiodic acid, hydrochloric acid or sulfuric acid; moreover, the color after reaction is liable to diffuse when detected on a substrate such as filter paper or nonwoven fabric, and is not easy to recognize. How to solve the problem has great significance for detecting explosives on site.

To date, no one has produced a colorimetric reagent for nitrate and nitrite in paste form for the detection of explosives. In order to solve the problems of colorimetric reagents of nitrate and nitrite, the method realizes the on-site, rapid, accurate and rapid detection of nitrate, nitrite and residues thereof.

The preparation method of the colorimetric paste for rapidly detecting nitrate and nitrite provided by the invention is a semisolid or approximately solid preparation prepared by uniformly mixing a colorimetric reagent for rapidly detecting nitrate and nitrite with an oleaginous or water-soluble substrate on the basis of the patent application No. 201811000105.1, has the characteristics of large loading agent amount, large adhesion, high drug release rate and small volume, is more convenient to carry and use when being filled into a toothpaste shell and a neutral pen core, and has the detection performance reaching or being greater than the performance of the colorimetric reagent.

Disclosure of Invention

The invention aims to provide a preparation method of colorimetric paste for rapidly detecting nitrate and nitrite, which is prepared by uniformly mixing a colorimetric reagent for rapidly detecting nitrate and nitrite and an auxiliary additive of Tween-20, Tween-40, Tween-60 or Tween-80. The device has the advantages of large reagent carrying amount, simple operation, small volume, convenient carrying, convenient storage, quick and accurate site, easy identification, high sensitivity, low detection limit, contribution to application and popularization and capability of providing an effective technical means for the site detection and analysis of explosives by safety departments.

The invention relates to a method for preparing colorimetric paste for rapidly detecting nitrate and nitrite, which is prepared by uniformly mixing a colorimetric reagent for rapidly detecting nitrate and nitrite and auxiliary additives of Tween-20, Tween-40, Tween-60 or Tween-80, and specifically comprises the following steps:

mixing colorimetric reagent for rapidly detecting nitrate and nitrite with tween-20, tween-40, tween-60 or tween-80 at a volume ratio of 10:1-6, placing into an ultrasonic cleaning instrument for ultrasonic treatment until the solution becomes viscous or pasty, thus obtaining colorimetric paste for rapidly detecting nitrate and nitrite, and sealing and storing the colorimetric paste.

The colorimetric paste for rapidly detecting nitrate and nitrite, which is obtained by the method, is a slightly gray viscous oily substance, has luster outside the paste and can be uniformly coated; when the nitrate radical and the nitrite are contacted, the drug release can be rapidly carried out, and suspected substances containing the nitrate radical and the nitrite are identified; the method has the advantages of good moisture retention, simple operation, small volume, convenient carrying and storage, quick and accurate site, easy identification, high sensitivity, low detection limit and contribution to application and popularization;

Detailed Description