Abstract: Methods of gas chromatography and UV-spectrophotometry for determination of 1,2,3-trimethoxybenzene content were studied. Test conditions of the methods were proposed. Statistical inspection results showed that the two groups of measuring data determined respectively by GC and UV were in compliance with normal distribution, therefore, both methods are practical. But distinct difference existed in statistical precision between methods of GC and UV, the former was more precise.

Key words: 3-trimethoxybenzene, gas chromatography, UV-spectrophotometry, quantitative determination