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Pretreatment method of azodiisobutyronitrile and determination method of trace element content

A technology of azobisisobutyronitrile and medium and trace elements, which is applied in the field of detection, can solve problems such as fire, explosion, and toxicity, and achieve the effects of accurate detection results, safe operation steps, and fast analysis speed

Pending Publication Date: 2022-03-18
山西钢科碳材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, due to the above-mentioned characteristics of azobisisobutyronitrile (such as the above-mentioned thermal decomposition, causing explosion, fire, flammability, toxicity, etc.), how to carry out pretreatment to azobisisobutyronitrile safely and quickly (digestion) known as technical problems

Method used

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  • Pretreatment method of azodiisobutyronitrile and determination method of trace element content
  • Pretreatment method of azodiisobutyronitrile and determination method of trace element content
  • Pretreatment method of azodiisobutyronitrile and determination method of trace element content

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Embodiment 1

[0070] In this example, the azobisisobutyronitrile samples of the ××× batch were pretreated, and then K, Na, Ca, Mg, and Fe in the azobisisobutyronitrile samples were measured using an inductively coupled plasma emission spectrometer. content of trace elements. Specifically include the following steps:

[0071] 1) Carry out the pretreatment step to the container: take 4 unused 50mL quartz beakers (that is, the container of the present embodiment selects the quartz beaker), soak with (1+1) nitric acid for 24 hours, and then wash with tap water, deionized Rinse with water several times, and then ultrasonically clean once with ultrapure water. Then, follow figure 2 In the muffle furnace, burn the cleaned quartz beaker to constant weight. Finally, take it out and cool it in a desiccator for later use.

[0072] 2) Sample addition steps:

[0073] a) Thoroughly stir the azobisisobutyronitrile sample evenly, and divide the sample into quarters until it reaches about 2-3 g, and s...

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Abstract

The invention relates to an azodiisobutyronitrile pretreatment method and a trace element content determination method, and mainly adopts the technical scheme that the azodiisobutyronitrile pretreatment method comprises the following steps: placing an azodiisobutyronitrile sample with a set mass at the bottom of a container to obtain the container containing the sample; the container containing the sample is heated to the ashing treatment temperature, so that the azodiisobutyronitrile sample in the container is subjected to ashing treatment, and ashed residues are obtained; wherein the ashing treatment temperature is 85-95 DEG C, and the ashing treatment time is 7-8 hours. The method for determining the content of the trace elements in the azodiisobutyronitrile comprises the following steps: carrying out pretreatment on an azodiisobutyronitrile sample by adopting the pretreatment method of the azodiisobutyronitrile, then determining by adopting an inductively coupled plasma emission spectrometer, and determining the content of the trace elements such as K, Na, Ca, Mg and Fe in the azodiisobutyronitrile sample.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a pretreatment method of azobisisobutyronitrile and a method for determining the content of trace elements. Background technique [0002] The content of trace elements such as K, Na, Ca, Mg, Fe in azobisisobutyronitrile will directly affect the quality of polyacrylonitrile solution, and further affect the quality of carbon fiber products. Therefore, there is a need for a simple, fast and accurate method for determining the content of trace elements in azobisisobutyronitrile. [0003] At present, there are few domestic manufacturers of azobisisobutyronitrile, and the amount used by enterprises is also small. Because azobisisobutyronitrile is insoluble in water, it will release nitrogen and -(CH 2 ) 2 -C-CN-based organic cyanide, and it will decompose rapidly at a temperature of 100°C, which can cause explosion and fire, is flammable, toxic, and the organic cyanide released by...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N21/73
CPCG01N1/44G01N21/73
Inventor 雷爱民张瑞婷李旭东周国十严华
Owner 山西钢科碳材料有限公司
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