Dissolving acetylene (two)

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The bromine method or the oleum method can choose one of the methods, and the bromine method is the arbitration method

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Acetylene is absorbed by the bromine saturated solution of potassium bromide , and a chemical reaction occurs to generate tetrabromoethane .

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Acetylene gas absorption tube: made of glass, with graduations, with a capacity of 50 mL and a graduation of 100

Figure 1 Acetylene gas absorption tube

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Connect the valve of the acetylene gas cylinder to be tested with the sample inlet 5, open the cock 2 and the cock 4, slowly open the valve, replace the air in the absorption tube 3 with the sample gas of the cylinder, and then take a sample, first close 2.

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The volume fraction of acetylene purity, the value is expressed in %, and the scale reading of the liquid level in the absorption tube 3 shall prevail

Take the arithmetic average of the two parallel determination results of each bottle of gas as the determination result, and the difference in volume fraction of the two parallel determination results shall not exceed 0.

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