Determination method for content of glycerol monoacetate and glycerol diacetate in glycerol triacetate for cigarettes
A technology of glycerol diacetate and glycerol acetate is applied in the field of determination of the content of glycerol monoacetate and glycerol diacetate in triacetin for cigarettes, and can solve problems affecting quantitative accuracy, acid return, and unqualified product quality. and other problems, to achieve the effect of simultaneous detection and accurate quantification, and accurate analysis and detection results
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Embodiment 1
[0030] Weigh 0.1000g of naphthalene (purity ≥ 99%) and dissolve it in a 1000ml volumetric flask, dilute to volume with anhydrous DMF, and use it as an internal standard solution for future use (internal standard concentration is 100 μg / ml).
[0031] Weigh 0.2500 g of glycerol triacetate (purity ≥ 99%) in a 250 ml volumetric flask, dilute to volume with anhydrous DMF, and use it as a standard stock solution for subsequent use (the concentration of the standard stock solution is 1.0 mg / ml). Pipette 1ml, 2ml, 3ml, 4ml, 5ml of standard stock solutions into 100ml Erlenmeyer flasks, add 20ml of internal standard solution, and mix well to obtain a series of standard working solutions.
[0032] The standard working solution was analyzed by gas chromatography mass spectrometer. The gas chromatographic conditions are: DB-5 fused silica capillary column (30m×0.53mm×1.5μm); inlet temperature: 260°C; temperature program: keep at 50°C for 1min, rise to 200°C at a rate of 5°C / min, Hold for ...
Embodiment 2
[0038] As described in Example 1, select another triacetin sample B, Image 6 It is the chromatogram of triacetin sample B for cigarettes, and the sample is measured twice, and the content of monoacetin in triacetin sample B is 371.6mg / Kg, and the content of diacetin is 242.3mg / Kg.
[0039] Figure 5 , Image 6 The retention time of 29.48min is the chromatographic peak of diacetin, and the retention time of 30.03min is the chromatographic peak of monoacetin.
[0040] The present invention uses anhydrous DMF as a solvent to dilute triacetin, avoiding the easy transesterification when diluting with alcohol solvents such as ethanol, and changing the true content of monoacetin, diacetin and triacetin, The phenomenon that affects the quantitative accuracy makes the analysis and detection results more accurate; adopts the high column capacity capillary chromatographic column with large pore diameter and thick liquid film to analyze triacetin samples, and realizes the simultaneous ...
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