Extraction detection reagent and extraction detection method for nitramine explosives in soil
A detection reagent and detection method technology are applied in the field of leaching detection reagents for nitramine explosives in soil, which can solve the problems of complex on-site detection operation and low detection efficiency of nitramine explosives, and achieve saving detection time and anti-interference ability. Strong, improve the effect of detection efficiency
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Embodiment 1
[0032] Example 1 A standard sample of nitramine-based explosive RDX was prepared and a standard linear equation between absorbance and corresponding concentration was obtained by spectrophotometry.
[0033] Accurately weigh 10.0 mg of RDX into 10 mL of DMSO solution to obtain a 1000 ppm RDX solution. The above RDX solution was gradually diluted with DMSO into 500, 200, 100, 50, 20, 10, 5, 1, 0.5, 0.1, 0.05, 0.01 and 0.00 mol / L RDX solutions by a stepwise dilution method. Take 1 mL of RDX solutions of different concentrations, add 0.026 mL of 0.05 mol / L NaOH aqueous solution to it, continue to add 0.052 mL of 1 mol / L HCl aqueous solution after mixing, and add 0.026 mL of 0.1 mol / L ABTS solution after mixing again.
[0034] After the above mixed solution was allowed to stand for 5 minutes, its absorbance value at 765 nm was measured by a hand-held absorptiophotometer. A linear equation was fitted to the absorbance value and the corresponding concentration, and the relationship ...
Embodiment 2
[0037] Example 2 Detection of RDX content in soil samples
[0038] Soil samples with different RDX contents were prepared by standard addition method: accurately weigh 10 mg RDX and dissolve it in 10 mL acetone to obtain 1000 ppm RDX solution; the RDX solution was gradually diluted with acetone into 50, 20, 10, 5 by the step-by-step dilution method. , 1 and 0.00mol / L of RDX solution; accurately weigh 2.0±0.1g of naturally air-dried soil, add 8mL of RDX solution of different concentrations to it, and volatilize the acetone in it in a ventilated place to obtain soil containing quantitative RDX sample.
[0039] Add 8 mL of DMSO (extraction reagent) to the soil sample, tighten the cap and shake for about 1 minute to fully mix the DMSO and the soil sample; let stand for 5 minutes, suck the upper layer solution with a syringe, and add nitrite to the syringe Filtration device and soil filter; push the syringe to pass the leaching solution through the nitrite filtration device and th...
Embodiment 3
[0044] Example 3 A standard sample of nitramine-based explosive HMX was prepared and a standard linear equation between absorbance and corresponding concentration was obtained by spectrophotometry.
[0045] Accurately weigh 10.0 mg of HMX into 50 mL of DMSO solution to give a 200 ppm HMX solution. The above HMX solution was gradually diluted with DMSO into 100, 50, 20, 10, 5, 1, 0.5, 0.1, 0.05 and 0.00 mol / L HMX solutions by a stepwise dilution method. Take 1 mL of HMX solutions of different concentrations, add 0.026 mL of 0.05 mol / L NaOH aqueous solution to it, continue to add 0.052 mL of 1 mol / L HCl aqueous solution after mixing uniformly, and add 0.026 mL of 0.1 mol / L ABTS solution after mixing evenly.
[0046] After the above mixed solution was allowed to stand for 5 minutes, its absorbance value at 765 nm was measured by a hand-held absorptiophotometer. A linear equation was fitted to the absorbance value and the corresponding concentration, and the relationship between ...
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