Industrial caprolactam. Determination of the absorption value of potassium permanganate. Spectrophotometric method (2)

6 Instruments

6.

6.

6.

6.

7 Analysis steps

7.

The glassware used for the first use is washed with sulfuric acid , then with tap water, then with hydrochloric acid , and finally with water, and at least every 6 months according to this method

After the glassware is used, if there is manganese dioxide deposited on the inner wall of the glass, it can be washed away with oxalic acid

7.

Weigh (3.

7.

Fill a 100mL volumetric flask with PAN water to the mark, and then follow the instructions in 7.

8 Result calculation

The absorption value x of potassium permanganate is calculated according to formula (1):

Where

A ₁ ——The value of the measured absorbance of the sample solution;

A ₀ ——The value of the absorbance measured in the blank test

The difference between the two parallel determination results is not more than 0.

9 report

The report should include the following:

a) All information about the sample, such as sample name, batch number, sampling location, sampling date, sampling time, etc.

b) Code of this part:

c) Analysis results and presentation method:

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

e) The name of the analyst and the date of analysis, etc.

f) Any description of operation or test conditions not included in this section
.

Related Links: Determination of Absorption Value of Potassium Permanganate Caprolactam for Industrial Use Spectrophotometry (1)