Improving the accuracy and precision of coal bed methane(CBM) estimates requires correction of older data from older coal exploration surveys to newer standards.Three methods,the depth gradient method,the contour aeri...Improving the accuracy and precision of coal bed methane(CBM) estimates requires correction of older data from older coal exploration surveys to newer standards.Three methods,the depth gradient method,the contour aerial weight method,and the well-point aerial weight method,were used to estimate the correction coefficient required to predict CBM gas content from coal exploration data.The data from the Nos.3 and 15 coal seams provided the coal exploration data while the CBM exploration stages within the X1 well block located in the southern part of the Qinshui Basin provided the data obtained using newer standards.The results show the correction coefficients obtained from the two aerial weight methods are similar in value but lower than the one obtained from the depth gradient method.The three methods provide similar results for the Nos.3 and 15 seams in that the correction factor is lower for the former seam.The results from the depth gradient method taken together with the coal seam burial depth and the coal rank suggest that variations in the correction factor increase linearly along with coal seam burial depth and coal rank.The correlation obtained can be applied to exploration and the evaluation of coal bed gas resources located in coalfields.展开更多
目的采用自身对照法测定复方甘草酸苷胶囊的溶出度。方法用转篮法,以900 mL pH6.8磷酸盐缓冲液为溶出介质,转速100 r·min^-1,取样时间30 min;将自身对照法和对照品对照法测得的数据进行统计比较。结果在自身对照法中,4.96~49.65μg...目的采用自身对照法测定复方甘草酸苷胶囊的溶出度。方法用转篮法,以900 mL pH6.8磷酸盐缓冲液为溶出介质,转速100 r·min^-1,取样时间30 min;将自身对照法和对照品对照法测得的数据进行统计比较。结果在自身对照法中,4.96~49.65μg·mL^-1甘草酸苷的线性关系良好(r=0.9999),回归方程为:Y=0.0178X-2.3×10^-3,平均回收率为99.72%,RSD=1.10%(n=6);加含量值校正的自身对照法与对照品对照法的结果无显著性差异。结论自身对照法简便、准确、可行,无需使用对照品;加含量值校正后,可作为复方甘草酸苷胶囊溶出度的测定方法。展开更多
基金supported by the National Basic Research Program of China (No. 2009CB219605)the National Natural Science Foundation of China (Nos. 40730422 and 40872104)
文摘Improving the accuracy and precision of coal bed methane(CBM) estimates requires correction of older data from older coal exploration surveys to newer standards.Three methods,the depth gradient method,the contour aerial weight method,and the well-point aerial weight method,were used to estimate the correction coefficient required to predict CBM gas content from coal exploration data.The data from the Nos.3 and 15 coal seams provided the coal exploration data while the CBM exploration stages within the X1 well block located in the southern part of the Qinshui Basin provided the data obtained using newer standards.The results show the correction coefficients obtained from the two aerial weight methods are similar in value but lower than the one obtained from the depth gradient method.The three methods provide similar results for the Nos.3 and 15 seams in that the correction factor is lower for the former seam.The results from the depth gradient method taken together with the coal seam burial depth and the coal rank suggest that variations in the correction factor increase linearly along with coal seam burial depth and coal rank.The correlation obtained can be applied to exploration and the evaluation of coal bed gas resources located in coalfields.
文摘目的采用自身对照法测定复方甘草酸苷胶囊的溶出度。方法用转篮法,以900 mL pH6.8磷酸盐缓冲液为溶出介质,转速100 r·min^-1,取样时间30 min;将自身对照法和对照品对照法测得的数据进行统计比较。结果在自身对照法中,4.96~49.65μg·mL^-1甘草酸苷的线性关系良好(r=0.9999),回归方程为:Y=0.0178X-2.3×10^-3,平均回收率为99.72%,RSD=1.10%(n=6);加含量值校正的自身对照法与对照品对照法的结果无显著性差异。结论自身对照法简便、准确、可行,无需使用对照品;加含量值校正后,可作为复方甘草酸苷胶囊溶出度的测定方法。
