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6 Operation steps
Use a glass syringe to inject 50 mL of distilled water into the pressure bottle (boil to cool or adjust to neutral before use), and weigh on the balance
Note: Under pressure, butadiene is a flammable gas, samples should be taken according to the relevant safety requirements of GB/T3723
7 Calculation
The amine content in butadiene is calculated according to formula (1) (calculated as NH 3 ):
In the formula: x—the content of amine in butadiene, mg/kg;
c—The actual concentration of hydrochloric acid standard solution, mol/L;
V—Consumption of hydrochloric acid standard solution, mL;
m—sample size, g;
0.
0.
8 Presentation of results
Take the arithmetic mean of repeated measurement results as the analysis result, and round it to 0.
9 precision
9.
In the same laboratory, operated by the same personnel, the same sample is repeated twice with the same instrument and equipment, and the difference between the results should not be greater than 0.
9.
To be determined
10 Test report
The report includes the following:
a) All information about the sample: such as sample name, sampling date, sampling time, sampling location, etc.
b) Measurement results;
c) Abnormal phenomena observed in the test;
d) Name of analyst and date of analysis, etc.
e) Code of this standard