Determination of tert-butylcatechol (TBC) in butadiene for industrial use (4)

4.

Use a syringe to fill the sample loop of the injection valve with the test solution (4.

A typical chromatogram is shown in Figure 1

Fig.

4.

4.

On the calibration curve, according to the measurement result (4.

Where:

w—The content of TBC in the sample, in milligrams per kilogram (mg/kg);

PT-TBC content in the test solution, the unit is milligrams per liter (mg/L);

P—The density of the sample at the temperature measured in 4.

V—The actual sampling volume, in millimedia (mL)

4.

Take the arithmetic mean of the two repeated measurement results as the analysis result

4.

In the same laboratory, the absolute value of the two independent test results obtained by the same operator using the same equipment, using the same test method, and testing the same object under test independently of each other in a short period of time should not exceed the repetition of Table 5.

Table 5 Repeatability of liquid chromatography

5 report

The report should include the following:

a) all information relating to the sample, such as sample name, batch number, sampling sites, sampling date, sampling time

b) The number of this standard,

c) Analyze the results

d) Details and descriptions of any abnormal phenomena observed in the measurement
.

e) the name of the analyst and analysis date
.