Titration method for determination of peroxide content in industrial butadiene (2)

7 Measurement procedure

7.

7.

Note: Butadiene is a flammable gas

7.

Note: Peroxide is unstable and will react violently when it is close to drying.

7.

7.

7.

7.

7.

8 Calculation

8.

In the formula: c—— the actual concentration of sodium thiosulfate standard titration solution, mol/L;

V ₁ ——The volume of sodium thiosulfate solution consumed in titrating the sample , mL;

V ₂ ——The volume of sodium thiosulfate solution consumed by titration reagent blank , mL:

m—— the mass of the butadiene sample, g;

0.

8.

The content of peroxide ( calculated as 1/2O ₂ ) in butadiene is expressed in mg/kg, rounded to the nearest 0.

9 Precision

9.

In the same experiment, the same operator is spared and the same instrument is used to make two repeated measurements on the same sample.

9.
2 Reproducibility

In any two different laboratories, different operators, using different instruments and equipment, at different or the same time, the difference between two independent measurement results measured on the same sample should not be greater than 3.
4mg/ kg
.

10 report

The test report should include the following:

a) All information about the sample (name, batch number, date, sampling location, etc.
);

b) Code of this standard;

c) Analysis results;

d) A description of any abnormal phenomena observed during the measurement;

c) analysis of a person's name and date analysis
.

Related Links: Titration Method for Determination of Peroxide Content in Industrial Butadiene (1)