基于X射线法无损测定再造烟叶基片的定量

Nondestructive determination of reconstituted tobacco paper base based by X ray method

采用X射线定量仪对不同配比的再造烟叶基片进行测定,通过分析管电压对该仪器测定结果的重复性、灵敏度和检出限的影响,优化出6 000V的管电压较适合测定基片的定量;并且发现测定不同配比再造烟叶基片的定量指示值和定量实测值有较高的线性关系,建立的线性回归模型决定系数>0.99,预测最大相对偏差<1%;含有不同含量碳酸钙的再造烟叶基片对模型的建立影响较大,含有不同含量梗末比和外加纤维的再造烟叶基片对模型的建立影响相对较小。

The reconstituted tobacco paper base with different ratios was determined by X-ray grammage instrument. The effect of tube voltage on repeatability, sensitivity and detection limit of the instrument was analyzed.The results show that tube voltage 6 000 V is more suitable for the determination about the grammage of the reconstituted tobacco paper base;and it is found that the grammage indication value has a high linear relationship with the grammage measured value about the reconstituted tobacco paper base with different ratios,and the established linear regression model with determination coefficient over 0.99,and the predicted maximum relative deviation less than 1 %, The reconstituted tobacco paper base with different content of calcium carbonate has great influence on the establishment of the model.The reconstituted reconstituted tobacco paper base containing different content of tobacco stem and tobacco powder ratio and external fiber wood pulp has relatively little influence on the establishment of the model.