Nitromethane for industrial use (Appendix A)

Appendix A

(Informative appendix)

Typical chromatogram for the determination of nitromethane content, the relative retention value of each component, and the determination method of the correction factor

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A typical chromatogram is shown in Figure A.

Figure A.

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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 ground bottle to accurately add the measured component nitromethane and calibration standard materials methanol, ethanol, acetonitrile, methyl formate, etc.

Measure the calibration standard sample under the same experimental conditions as the measured sample, and measure 3 times in parallel, and take the arithmetic average of the peak areas of the 3 measurements as the measurement result

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

Where:

A—The peak area of ​​nitromethane;

A _i —the peak area of ​​component i;

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

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

A.
3.
4 Periodic determination of relative correction factors

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

Related Links: Nitromethane for Industrial Use (3)