RU2560712C1 - Polyfunctional indicator composition for rapid detection of explosive traces after terrorist acts - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention provides a polyfunctional indicator composition for rapid detection of dinitrotoluene-based explosive traces after terrorist acts, which includes cetylpyridinium chloride, alkyl dimethylamine, alkyl benzene sulphonate, glutaric aldehyde, isopropyl alcohol, nonionic surfactant OP-7, oxalic acid, sodium hexametaphosphate, dithizone and water, wherein components of the composition are in a certain ratio in wt %.

EFFECT: broader functional capabilities owing to simultaneous disinfection and decontamination of surfaces of objects and rapid detection of traces of dinitrotoluene-based explosives on surfaces.

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Description

The invention relates to the field of multifunctional indicator compositions for the comprehensive conduct of decontamination, disinfection and rapid detection of traces of explosives based on dinitrotoluene.

In the complex of anti-epidemic and sanitary-hygienic measures carried out in infectious foci, an important element is the disinfection of surfaces of objects.

Due to the complex nature of possible infection, it is important to develop a multifunctional indicator composition for the simultaneous decontamination and disinfection of the surfaces of infected objects.

In the event of the possible commission of terrorist acts with the use of explosives, the detection of traces of explosives in the foci of destruction is also relevant.

Known aerosol decontaminating agent containing monohydroxy alcohol, propellant, alkylbenzenesulfonate, nonionic surfactant, organic acid, complexing agent and water in the following ratio of components, mass. percent (patent for the invention No. 2290208 of November 16, 2004):

alkylbenzenesulfonate or sulfonol - 0.5-5;

polyphosphate (sodium hexametaphosphate) - 0.3-0.5;

monohydric alcohol - 2.0-5.0;

nonionic surfactant (OP-7 or OP-10) - 0.1-1.5;

organic acid - 0.5-2.0;

anticorrosive substance (sodium hexametaphosphate) - 0.5-1.0;

complexing agent (dithizone) - 0.02-0.04;

water - 90.0-95.0;

propellant (dichlorodifluoromethane) - 8.0-85.0.

However, this tool is suitable only for decontamination.

Known application for disinfection of surfaces of objects of formulations based on Quaternary ammonium compounds (hereinafter referred to as HOUR). Thus, the well-known disinfectant substance “VTS 50 RU” manufactured by STEPAN E1JOURE France (Stepan Europe, France) (benzalkonium chloride) is an aqueous solution of the main substance - alkyl dimethylbenzylammonium chloride - 51% and impurities alkyl (C ₁₂ -C ₁₆ ) dimethylamine - not more than 1%. Using this recipe, you can only disinfect the surfaces of objects.

The disadvantage of the above existing compounds is their monofunctionality, that is, the use only for decontamination (first composition) or disinfection (second composition) of the surfaces of objects.

It is known to use a quaternary ammonium compound such as didecyl methylammonium halide clathrate with carbamide as an active agent providing a complex action, in particular for degassing, disinfection, disinsection, decontamination and shielding, while the composition based on this active substance is used in the form of a foam (patent for invention No. 2290208 of November 16, 2004).

The disadvantage of this composition is the need for subsequent application to the foam layer of another composition effective to inactivate the active substance, and / or application of an antifoam on the foam layer to destroy it.

Previously, the ability of compounds belonging to the HOUR class to be used to detect explosives based on dinitrotoluene was established.

Thus, a formulation containing an alcoholic solution of tetrabutylammonium chloride allows for the rapid detection of these substances on the surfaces of various objects (patent for invention No. 2290208 of November 16, 2004).

The technical result achieved by the present invention is to expand operational capabilities due to the simultaneous disinfection, decontamination of the surfaces of objects and rapid detection on the surfaces of traces of explosives based on dinitrotoluene.

This technical result is achieved by the fact that we offer a multifunctional indicator composition for the express detection of traces of explosives after terrorist acts, which is a water-alcohol solution of alkylbenzenesulfonate, a nonionic surfactant, an organic acid, an anticorrosive substance and a complexing agent, while disinfection is ensured, decontamination of surfaces of objects and express detection on the surfaces of traces of explosives based on dinitrotoluene, the following components are used in their quantitative ratio, mass. %:

cetylpyridinium chloride - 26.0;

alkyldimethylamine - 1.0;

alkylbenzenesulfonate 6.0;

glutaraldehyde - 1.0;

isopropyl alcohol - 3.0;

nonionic surfactant (OP-7) - 1.0;

oxalic acid - 1.0;

sodium hexametaphosphate - 1.0;

dithizone - 0.1;

water - up to 100.

A multifunctional indicator composition for express detection of traces of explosives after terrorist acts, which is a water-alcohol solution of alkylbenzenesulfonate, a nonionic surfactant, an organic acid, an anticorrosive substance and a complexing agent, in which for the simultaneous disinfection, decontamination of surfaces of objects and rapid detection The following components are used on the surfaces of traces of dinitrotoluene-based explosives Quantitatively, the ratio, by weight. %:

cetylpyridinium chloride - 26.0;

alkyldimethylamine - 1.0;

alkylbenzenesulfonate 6.0;

glutaraldehyde - 1.0;

isopropyl alcohol - 3.0;

nonionic surfactant (OP-7) - 1.0;

oxalic acid - 1.0;

sodium hexametaphosphate - 1.0;

dithizone - 0.1;

water - up to 100.

In the case of surface treatment with this multifunctional indicator composition, it is deactivated and disinfected.

In addition, in the presence of traces of dinitrotoluene-based explosives on the surface, characteristic brown spots appear on the surface for several hours.

This multifunctional indicator composition is used in a special aerosol device. The aerosol device is a spray can of various volumes, equipped with a sprayer and filled with a multifunctional indicator formulation. Formulation is sprayed using compressed air pressure generated by a spray pump.

The detection of polynitroaromatic compounds based on dinitrotoluene is based on the reaction occurring during the interaction of a substance belonging to the class of quaternary ammonium compounds with a solution of dinitrotoluene, which leads to the appearance of a characteristic brown stain, and the staining that appears remains for a long time (more than 5 days).

The advantages of using this multifunctional indicator composition in an aerosol device over known compositions are as follows:

no need for direct contact of the operator with the analyzed surface;

the multiple use of one package (at least 100 times), which allows you to repeatedly process the surface of the object;

maintaining operability in the temperature range from 0 ° С to plus 50 ° С;

provides a large area of processing and control;

the formulation used is not toxic;

Freon with its ozone-depleting potential is not used;

the aerosol device is made of polymeric materials and is corrosion-resistant and shockproof;

in case of detection of dinitrotoluene compounds, sampling with subsequent processing and analysis in a specialized laboratory is not required;

convenience and safety in use;

preservation of properties in the presence of possible impurities (oil, fuel, etc.);

allows for processing and rapid detection on vertical, inclined and horizontal surfaces;

the formulation is prepared on the basis of alcohol solutions and is non-toxic, in case of contact with exposed skin, it is enough to wash it off with soap and water;

provides a contrasting and time-stable indicative effect upon detection of dinitrotoluene compounds, lasting for a long time.

Conducted experimental storage showed the stability of the formulation when stored in an aerosol device and the preservation of its performance for at least 2 years.

Experimental studies have shown that the best effect is achieved when using a composition consisting of (wt.%):

cetylpyridinium chloride - 26.0;

alkyldimethylamine - 1.0;

alkylbenzenesulfonate 6.0;

glutaraldehyde - 1.0;

isopropyl alcohol - 3.0;

nonionic surfactant (OP-7) - 1.0;

oxalic acid - 1.0;

sodium hexametaphosphate - 1.0;

dithizone - 0.1;

water - up to 100.

With a lower content of cetylpyridinium chloride and alkylbenzenesulfonate, the required quality of disinfection, decontamination and the visibility of the obtained indication effect are not ensured, and the use of their higher concentrations is inappropriate due to a further slight increase in the disinfecting effect, increased destructive effect on processed products and adverse effects on human health.

To carry out disinfection, decontamination and detection of traces of explosives directly on the surface of objects using an aerosol device, the following operations are carried out:

remove the cap from the spray pump, bring the aerosol device at a distance of 10-20 cm from the surface to be monitored, taking into account the direction of the wind;

repeatedly pressing the button or handle of the spray pump, spray a multifunctional indicator solution on the surface to be examined;

in the case of traces of dinitrotoluene, observe the appearance of an indication effect on the controlled surface. The appearance of a brown color in accordance with the standard indicates the presence on the surface of explosives based on dinitrotoluene compounds. The indication effect persists for a long time (several days).

In cases where the indication effect is not visible, as well as when the surface color matches the color of the indication effect, a cotton-gauze disk or a strip of filter paper was wetted with a multifunctional indicator formulation, they wiped the analyzed surface with an area of about 100 cm ² and the appearance of the indication effect on the filter surface was observed paper. It is possible to apply the formulation directly to the surface to be examined, followed by wiping it with a cotton-gauze disk.

In order to detect dinitrotoluene under the conditions of the experiment, they were applied onto stainless steel, aluminum, and tile plates and painted with XB-518 paint with an area of 100 cm ² by irrigation using a 1% alcohol solution of dinitrotoluene. The application of dinitrotoluene solution on the surface was carried out by spraying it using an aerosol device. The dispersion of the aerosol formulation was 100-200 μm. After applying the solution, the surfaces were kept at the test temperature (0 ° С, plus 20 and plus 50 ° С) for at least 0.5 hours.

After 0.5 h, 1 h and 2 h after application of dinitrotoluene solution to the plates, cotton-gauze disks or strips of filter paper from the aerosol device were wetted with a multifunctional indicator formulation. Then, sampling was carried out by rubbing them over the entire treated surface without violating its integrity for 1 min.

On other plates with a dinitrotoluene solution, as well as on cotton-gauze disks and filter paper strips obtained after surface treatment, from the aerosol device, the proposed multifunctional indicator formulation with an application rate of 0.3-1.0 l / m ² .

The appearance of a characteristic indicator effect on cotton gauze disks and filter strips was observed.

In the case of spraying a multifunctional indicator formulation from an aerosol device directly onto the analyzed surface, the appearance of an indication effect on this surface was observed. The time of occurrence of the indicator effect was recorded. The test results are shown in the table.

The results of the tests showed that the multifunctional indicator composition for the express detection of traces of explosives after terrorist acts in an aerosol device without the use of additional devices and reagents remains operational and provides detection of traces of dinitrotoluene compounds on various surfaces in the temperature range from 0 ° C to + 50 ° C 2 hours after surface treatment with dinitrotoluene solution. Along with the quaternary ammonium compound (BTC 50 RU), a composition based on biguanidines and amines (catamine, catamine AB) was also tested as a multifunctional indicator formulation. In all cases, a positive result of detecting traces of dinitrotoluene was obtained.

The time of occurrence of the indicator effect when applying a multifunctional indicator composition to the test surface treated with 1% dinitrotoluene solution is 25-70 seconds, depending on the surface temperature.

Thus, the proposed multifunctional indicator composition for express detection of traces of explosives after terrorist attacks provides express detection of compounds on the surfaces of objects in a wide range of operating temperatures.

The results of evaluating the bactericidal ability of the multifunctional indicator formulation for inactivation of microorganisms confirmed the presence of disinfectant properties at an exposure time of 30-120 minutes.

Checking the deactivating properties of the multifunctional indicator formulation confirmed her ability to reduce the exposure dose of gamma radiation.

The aerosol device (hereinafter AC) has a low cost, optimal weight and size characteristics, provides a low specific consumption of a multifunctional indicator formulation, when spraying, the required dispersion and uniformity of the spray torch are achieved. Each aerosol device is labeled by offset printing on self-adhesive white semi-gloss paper that is resistant to aggressive media.

Label contains:

Conditional and full name of the product;

volume of multifunctional indicator formulation;

information about the purpose of the AU and the method of its use;

indication effect upon detection of dinitrotoluene compounds;

production date;

shelf life.

Aerosol devices can be supplied as a kit. This kit is designed for decontamination, disinfection and rapid detection of dinitrotoluene compounds on horizontal, inclined and vertical surfaces. The kit is shown below.

Aerosol device pcs. 2

including:

spray pump one

case, pcs. one

multifunctional indicator formulation from 0.15 to 1.5 l

label, pcs. one

Set of accessories, pcs., 1

including:

spray pump one

cotton-gauze disk with a diameter of 60 mm, pcs. one hundred

operational documentation, set 1

cardboard packaging, pcs. one

The main characteristics of the kit for decontamination, disinfection and rapid detection of dinitrotoluene compounds are determined:

preparation time for work, no more, min one dinitrotoluene compounds detection time, no more than min four time to save the indicator effect, at least hours one threshold sensitivity, mg / ml 5 · 10 ^- 1 operating temperature range, ° С 0 - plus 50 AU mass, kg from 0.15 to 1.5 size of detected drops, not less than, microns 150 frequency of use, not less than, times fifty warranty period of storage, not less than, years 2

Scopes of the kit

Carrying out decontamination, disinfection and rapid detection of traces of dinitrotoluene compounds by aerosol irrigation of the surfaces of objects;

identification of spills (spills), contamination and surface cleanliness of containers used for the transport of explosives based on dinitrotoluene;

quality control of washing surfaces of objects from traces of dinitrotoluene compounds.

The proposed technical solution is industrially applicable, since standard equipment and widespread materials and chemical reagents can be used for its implementation.

Claims (1)

A multifunctional indicator composition for the express detection of traces of explosives after terrorist acts, which is a water-alcohol solution of alkylbenzenesulfonate, a nonionic surfactant, an organic acid, an anticorrosive substance and a complexing agent, characterized in that for the simultaneous disinfection, decontamination of surfaces of objects and express Detection on the surfaces of traces of dinitrotoluene-based explosives using the following nt at their quantitative ratio, wt. %:
cetyl pyridinium chloride 26.0 alkyldimethylamine 1,0 alkylbenzenesulfonate 6.0 glutaraldehyde 1,0 isopropyl alcohol 3.0; nonionic surfactant substance OP-7 1,0 oxalic acid 1,0 sodium hexametaphosphate 1,0 dithizon 0.1 water one hundred