Industrial Dimethylformamide (Appendix A)

Appendix A

(Normative appendix)

Typical chromatograms for the determination of dimethylformamide , methanol , and heavy components, determination methods of relative retention values ​​and correction factors of each component

A.

A typical chromatogram is shown in Figure A.

Figure A.

A.

The relative retention value and relative correction factor of each component are shown in Table A.

Table A.

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Use a clean, dry, and sealable narrow-mouth bottle to add the tested components dimethylformamide, methyl formate, methanol , dimethylformamide , dimethylacetamide , methyl ethyl by accurately weighing Formamide, monomethylformamide, formamide, etc.

A.

The correction factor f _{i of} each component relative to dimethylformamide is calculated according to formula (A.

Where:

A _s —the peak area of ​​dimethylformamide;

A _i —the peak area of ​​component i;

m _s —The value of the mass of dimethylformamide , in grams (g);

m _i —the value of the mass of component i, in grams (g)

A.

The correction factor should be actually measured and should be checked regularly
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Related Links: Industrial Dimethylformamide (5)