6 results about "Chloropicrin" patented technology

The invention relates to the technical field of gas analysis, in particular to a determination method for detecting impurity elements in chlorine-nitrogen mixed gas by an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method. The invention establishes an analysis method for determining the contents of eight elements including iron (Fe), chromium (Cr), copper (Cu), zinc (Zn), nickel (Ni), sodium (Na), cadmium (Cd) and phosphorus (P) in chlorine-nitrogen mixed gas by an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method. By optimizing ICP-MS analysis conditions and a sample pretreatment process and adopting an electronic-grade solvent to leach elements, rapid and accurate detection and high reproducibility of the impurity content in the chlorine-nitrogen mixed gas are realized. The method can be applied to quality control and analysis in the production process of a chlorine-nitrogen mixed gas product, and lays a foundation for establishing a standard of a chlorine-nitrogen mixed gas analysis method.

This invention discloses a method for preparing recycled planting soil from river dredging soil. First, 0.5-1% wt quicklime and 20-30 g / cubic meter of chloropicrin are mixed into low-moisture dredging soil cake, then covered with a film and left to stand at room temperature for 3-4 days to allow the ash to settle. Next, 1-2% wt wood ash, 1-3‰ wt indoleacetic acid, and 3-6% wt magnesium peroxide are mixed into the sterilized dredging soil. Finally, a soil layer structure is laid, thereby creating a planting environment that promotes plant root growth. This invention's preparation method is simple, resource-efficient, and environmentally friendly. It effectively solves the problems of low plant survival rates and slow growth when dredging soil is directly used for planting, and alleviates many problems associated with storing dredging soil.

The present invention relates to the field of plant nutrition, and particularly to an optimized nitrogen fertilization strategy based on soil fumigation. The present invention provides a nitrogen fertilizer application strategy based on soil fumigation, comprising the following steps: applying nitrogen fertilizer after soil fumigation; the soil fumigant comprises one or more of chloropicrin, dazomet, methamphetamine, dimethyl disulfide, horseradish, and ethionol; the fumigant dosage is divided into a low dose of 20 to 40 kg / mu and a high dose of 40 to 80 kg / mu; the nitrogen fertilizer is a combination of ammonium nitrogen and nitrate nitrogen, with 1 / 8 of the nitrogen fertilizer's mass used as a base fertilizer, and the remaining nitrogen fertilizer is applied in four equal portions as topdressing; the total amount of the base fertilizer and topdressing is 32 to 40 kg / mu; the mass ratio of ammonium nitrogen fertilizer to nitrate nitrogen fertilizer in the nitrogen fertilizer is 50 to 100:0 to 50; and the mass of ammonium nitrogen fertilizer and nitrate nitrogen fertilizer in the nitrogen fertilizer is unequal. Compared with conventional nitrogen application, this method can significantly increase crop yields.

The utility model discloses a vibration screen limiting device for insect and mould killing machine belongs to technical field, including vibration subassembly, including mounting bracket, vibration screen body is provided with at mounting bracket top, fixed base is set up in mounting support top, is used for limiting and fixing to mounting bracket, be provided with second motor in the fixed base, second motor output is provided with the fixed part for fixing to mounting support, fixed base one side is provided with mounting plate, the effect is through setting fixed part and limiting portion, through the drive of first motor and second motor, the front and rear and left and right direction of mounting bracket of vibration screen body bottom are all limited and fixed, and the fixed base is fixed on the ground, so can effectively fix vibration screen body, prevent its whole from shaking in the working process, greatly increase its stability.

The present invention relates to the technical field of pollutant analysis and identification, and discloses a method for rapidly detecting typical halogenated organic pollutants in aquatic plants. The method provided by the present invention can simultaneously detect a variety of volatile halogenated organic compounds including chloroform, bromodichloromethane, dibromochloromethane, bromoform, dichloroacetaldehyde, trichloroacetaldehyde, dichloroacetonitrile, dibromoacetonitrile and chloropicrin at one time, greatly improving the detection efficiency and providing the possibility for rapid screening and quantitative analysis of complex and diverse halogenated pollutants in plants. The method provided by the present invention is a detection method for volatile halogenated organic pollutants in plants, which is characterized by being simple and quick to operate, having a low detection limit, high sensitivity and excellent linear correlation, and ensuring accurate measurement results.

A method for extracting propionitrile from liquid chloropicrin includes the step of supplying a feed solution composed of liquid chloropicrin and a propionitrile solute dissolved therein. A liquid aqueous solvent that is immiscible with the feed solution is also supplied. The solvent absorbs at least a portion of the propionitrile solute from the feed solution, and the feed solution and the solvent are mixed to extract. Thereafter, the feed solution is separated from the solvent and the extracted propionitrile solute to produce a liquid extract and a liquid raffinate. The liquid extract contains the aqueous solvent and the propionitrile solute absorbed by the solvent, and the raffinate contains the feed solution from which the propionitrile solute has been extracted.