样品0.200 0 g在乙醇中超声提取30 min，再用乙醇稀释至10.0 mL。提取液以Zorbax SB-C₁₈色谱柱为固定相，以乙腈-0.1%（体积分数）甲酸溶液（17+3）混合液为流动相进行色谱分离。质谱分析中采用电喷雾正离子源，多反应监测模式，基质匹配制作标准曲线，外标法定量。结果表明：松香酸和11-羰基-β-乙酰乳香酸的质量浓度均在10.0~1 000 μg·L^-1范围内呈线性，检出限（3S/N）分别为0.9，3.1 μg·kg^-1。按标准加入法在3个浓度水平上进行加标回收试验，测得回收率在95.2%~101%之间，日内、日间精密度（n=6）均小于9%。

The sample (0.200 0 g) was extracted ultrasonically with ethanol for 30 min, and diluted to 10.0 mL with ethanol. The extract was separated by UHPLC using Zorbax SB-C₁₈ column as stationary phase, and mixture of acetonitrile and 0.1% (φ) formic acid solution (17+3) as mobile phase. In MS analysis, ESI⁺ and MRM were adopted. Quantification was attained by external standard method with preparation of standard curves by matrix-matching method. As shown by the results, linear relationships between values of peak area and mass concentration of abietic acid and 11-carbonyl-β-acetyl boswellic acid were found in the same range of 10.0-1 000 μg·L^-1, and the detection limits (3S/N) found were 0.9, 3.1 μg·kg^-1 respectively. Test for recovery was made by standard addition method at 3 concentration levels, giving results in the range of 95.2%-101%. Values of the inter-and intra-day precision (RSDs, n=6) were all less than 9%.