,MEASUREMENT OF POLYOXYMETHYLENE DIMETHYL ETHERS PRODUCTS COMPOSITION BY GAS CHROMATOGRAPHY

Abstract

Abstract: A gas chromatography method for determination of polyoxymethylene dimethyl ethers products composition was developed. The relative mass correction factors of methanol (MeOH), methyl formate (MF), trioxane (TOX) and polyoxymethylene dimethyl ethers (PODE_n,n≤3) were determined by using ethylene glycol diethyl ether as internal standard. From dimethoxymethane (DMM), PODE2 and PODE3 used as primary standard materials, the relative mass correction factors of PODE4-10 components were extrapolated. The relative mass correction factors of hemiacetal (HF_n) were calculated by effective carbon number method. The results of precision and recovery showed that the relative standard deviations were less than 2.0%, and the recovery rate ranged between 99%-104%, which could meet the requirements of the quantitative analysis for polyoxymethylene dimethyl ethers product from different water content of raw materials.

Key words: polyoxymethylene dimethyl ethers, gas chromatography, hemiacetal, quantitative analysis

References

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^,MEASUREMENT OF POLYOXYMETHYLENE DIMETHYL ETHERS PRODUCTS COMPOSITION BY GAS CHROMATOGRAPHY

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