A detection method for halogen and sulfur content in hazardous waste samples
A detection method and technology for sulfur content, applied in the field of chemical analysis and detection, can solve the problem of inability to accurately measure the content of sulfur and halogen elements, and achieve the effects of avoiding ion interference with the detection baseline, improving accuracy and improving detection limit.
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Embodiment 1
[0046] A liquid detection method in a sample of hazardous waste halogen and sulfur contents:
[0047] a, 3-5ml amount of hazardous waste in a sample dish combustion, combustion gun using butane gas flame spraying mineral oil, with vigorous combustion of the sample, emitting smoke, combustible is determined; was added in the weighing dish hazardous waste about 1g sample was allowed to stand for 1 minute in an analytical balance, the balance drift amount no more than 1%, less volatile sample is determined; therefore, determined that the sample is a flammable hazardous waste non-volatile sample;
[0048] B, accurately weighed sample of the hazardous waste 1.0-1.5g, placed in a quartz dish combustion, the oxygen bomb bottom added 10mL20mmol / LNaOH solution, preferably 5 mL pure grade hydrogen peroxide, the ignition wire installation, mounted on the bomb calorimeter testing platform , pure oxygen is injected into the bomb to a pressure of 2.8-3.0MPa, oxygenation time 15-20s, and relea...
Embodiment 2
[0072] A liquid detection method in a sample of hazardous waste halogen and sulfur contents:
[0073] a, 3-5ml amount of hazardous waste in a sample dish combustion, combustion gun using butane gas flame spraying mineral oil, with vigorous combustion of the sample, emitting smoke, combustible is determined; was added in the weighing dish hazardous waste about 1g sample was allowed to stand for 1 minute in an analytical balance, the balance drift amount exceeds 1%, volatile sample is determined; therefore, the sample is determined hazardous waste flammable volatile sample;
[0074] B, accurately weighed sample of the hazardous waste 1.0-1.5g, placed in sealed plastic tube, the plastic tube is placed in a quartz seal sealing the combustion dish, the bottom of the oxygen bomb was added 10mL 23mmol / LNaOH solution, 5 mL excellent pure fractions hydrogen peroxide, the ignition wire installation, mounted on the bomb calorimeter detection platform, pure oxygen is injected into the bomb ...
Embodiment 3
[0090] One kind of hazardous waste and a method for detecting in a sample the sulfur content of the halogen:
[0091] a, 3-5ml amount of hazardous waste in a sample dish combustion, combustion gun using butane gas flame spraying mineral oil, the sample may be burned, but the combustion state is not severe, it is determined that fuel; adding weighing dish hazardous waste about 1g sample was allowed to stand for 1 minute in an analytical balance, the balance drift amount no more than 1%, less volatile sample is determined; therefore, the determination of combustible hazardous waste to non-volatile sample sample;
[0092] B, accurately weighed sample of the hazardous waste 4.0-5.0g, placed in a centrifuge tube, add the hazardous waste 1-1.5 times the mass of the sample in absolute ethanol in a centrifuge tube, mixed uniformly, accurately weighed mixture Add quartz combustion dish, the bottom of the oxygen bomb was added 10mL 25mmol / LNaOH solution, preferably 5 mL pure grade hydroge...
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