Glacial acetic acid for industrial use (Appendix A, Appendix B, Appendix C)

Appendix A

(Informative appendix)

The chapter number of this standard is compared with the standard chapter number of ASTMD3620-04

Table A.

Table A.

Appendix B

(Normative appendix)

Comparison table of relationship between crystallization point and content of glacial acetic acid

The comparison table of the relationship between the crystallization point and content of glacial acetic acid is shown in Table B.

Table B.

Appendix C

(Normative appendix)

Determination of relative mass correction factor

C.

C.

C.

C.

C.

C.

C.

Add 1 g of potassium permanganate to 1000 mL of glacial acetic acid and distill to prepare glacial acetic acid without formic acid.

C.

After the instrument's operating conditions are stable, perform the measurement under the same test conditions as the test samples

C.

The relative mass correction factor of formic acid/calculated according to formula (C.

Where:

A _s —The peak area of ​​ethyl acetate, in square centimeters (cm) or millivolt minutes (mV, min);

m _i —The mass of the formic acid standard sample.
The unit is gram (g);

A _i — the peak area of formic acid , in square centimeters (cm²) or millivolt minutes (mV, min);

m _s —The mass of ethyl acetate , in grams (g)
.

C.
2 Periodic determination of relative quality correction factors

The relative quality correction factor should be actually measured and should be checked regularly
.

Related links: Glacial acetic acid for industrial use (8)